How much shock for 1500 gallon pool

Clean the pool before shocking, to remove leaves or debris. Lower the pH level to 7.2, to increase pool shock potency. Sprinkle shock into pool, or broadcast across the surface. Vinyl pools should pre-dissolve in a 5-gal bucket of water. Run the filter and brush the pool afterwards to disperse.

Enter your total pool volume and total alkalinity reading (from your test) below to find out what and how much to add. I've already pre-filled the desired total alkalinity level to 100 ppm, but if you're shooting for a lower or higher number inside the ideal range (80-120 ppm), feel free to adjust it. If your total alkalinity levels are too ...Step 1: Determine your pool’s volume. This is typically measured in gallons or liters, and can be calculated by multiplying the length, width, and average depth of your pool. Step 2: Determine the dosage required. This will depend on the concentration of the liquid shock you are using and the volume of your pool.The set also includes a ladder and a pool cover. Your family will love spending the day in this Power Steel pool! Size: 18 ft. x 48 in. (5.49 m x 1.22 m) Water Capacity (90%): 6,092 gal. (23,062 L) Tritech™ enhanced 3-ply liner is 15% more tear resistant, 33% more stretch resistant and 83% more puncture resistant than standard PVC.Step 2: Filter and Vacuum Debris. ... Step 3: Balance Your Pool Chemicals. ... Step 4, Option 1: Use a Pool Clarifier To Clear Cloudy Pool Water. ... Step 4, Option 2: Use a Flocculant To Clear Cloudy Pool Water. Boost it up to 30 ppm by adding 3 lbs of Stabilizer per 10,000 gallons of pool water, to protect free chlorine from the sun.Shocking the pool with chlorine and filtering the dead algae out. The amount of chlorine needed to clear a green pool depends on how green the pool is. It is better to overdose a pool with chlorine to ensure all the algae is killed. As an indication a very green pool could need as much as 150grams per 1,000 gallons.To find out your combined chlorine level, test your water and subtract your free chlorine level from the total chlorine level. Step 4. Make A Shocking Solution. If using granular shock, you'll need a 5 gallon bucket for this part. Start by filling the bucket with water (about ¾ full), and then adding in 1 bag of shock.

While you can't necessarily shock your pool too many times, you can use too much shock at once. For every 10,000 gallons of pool water, you'll want to use one pound of granular shock; if you pour in a lot more than that, it can take longer than 24 hours or so for the chlorine levels to drop to one that's safe for swimmers (between 1 and 3 ...Its a relatively simple process that can help keep your water safe and clean for an extended period. But, it also requires doing the math to ensure you add the correct amount per 15,000 gallon of pool water. This guide will walk you through the calculations for proper liquid chlorine shock dosage based on your pool size and other factors.Run the Filter. Now that the pool has been shocked and brushed down, the algae and debris will be floating at the top. Leave your pool on (this includes overnight) until the water becomes clear. It is perfectly normal for it to. take a few days (usually 2 to 3 days) of continuous running to allow the filter to remove all of the algae and ...May 29, 2023 · Experts recommend using one pound of shock per 10, 000 gallons of water, so for a 500-gallon pool, you would need approximately 0.05 pounds or two ounces of shock treatment. “It’s important not to over-shock your pool, “ says expert Michael Rathburn from Swim University. “Too much chlorine can irritate swimmers’ skin and eyes.”. This depends on several factors such as the size and depth of the pool, amounts of chlorine already present in the water, and type of shock used. The most common types are calcium-hypochlorite based shocks or lithium-based shocks (also known as non-chlorine shocks).‎Champion Pool Shock - Ready To Use Liquid Chlorine - Commercial Grade 12.5% Concentrated Strength - 1 Gallon : Size ‎1 Gallon : Additional Information. ASIN : B07W6J2YX7 : Customer Reviews: 4.5 out of 5 stars 1,820. 4.5 out of 5 stars : Best Sellers RankThe ideal salt level for a saltwater pool is 3,200 parts per million (ppm), but anywhere between 2,700 and 3,400 ppm is also acceptable. Anything below 2,700 ppm and the salt generator likely won't be able to make enough chlorine to keep your water properly sanitized. Much more than 3,400 ppm and your water can become corrosive to metal.Knowing how much shock to add to the pool depends on the company and the calcium hypochlorite concentration. For example, some brands sell shock bags that treat 5,000 gallons, while some bags go up to 7,500 gallons per bag. Always read the labels to know how much shock should be added for your pool's gallon total.

Liquid shock usually is sold by the gallon size container, which can be heavy and take up lots of space if you're going to need a lot. Powdered shock is sold by the pound size bag, but will usually have to be pre-mixed in a bucket of water to prevent staining of the vinyl swimming pool liner. Some advantages of the liquid type shock is that ...For dark green or black algae, adding enough pool shock to reach 30 ppm may be necessary. Shocking the pool to 30 ppm of free chlorine, with proper pH, eradicates most algae. For best results, vacuum the pool before shocking, and brush the entire pool before and after shocking.There is no free chlorine in the pool after shocking due to impatience and not waiting at least 8 hours for the water to settle. Additional reasons can include algae/debris in the water, not enough shock, or a high pH level that has to be adjusted. This can happen when a pool owner is shocking the pool for the first time.For your backyard pool, free chlorine should be around 2-4 ppm (parts per million), ideally nestled around 3 ppm. For commercial pools, 3-5 ppm is fine. Do you have your reading? If so, let’s move on. Measure Your Pool Volume. Next, you need to measure how many gallons of water are in your pool. You can use my calculator below to figure that out.Step 2: Determine the current chlorine level. Use a pool water test kit to check the current chlorine level in your pool. The recommended range for chlorine is between 1 and 3 parts per million (ppm). If the chlorine level is too low, you'll need more shock to bring it up to the appropriate level.The Right Amount of Chlorine Shock to Use in Your Pool *For calcium hypochlorite or powder chlorine, 1 pound is ideal for every 10,000-gallon pool. In case of algae, triple-shock the pool by adding 3 pounds for every 10,000 gallons.

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For example, if you have a pool with 20,000 gallons you’ll need a pump that can move 2,500 gallons in an hour. [20,000 ÷ 8 = 2,500] GPH is a little annoying to deal with because most pumps talk about water movement in gallons per minute (GPM), so then we divide that by 60.Aug 25, 2020 · For example, if you have a pool with 20,000 gallons you’ll need a pump that can move 2,500 gallons in an hour. [20,000 ÷ 8 = 2,500] GPH is a little annoying to deal with because most pumps talk about water movement in gallons per minute (GPM), so then we divide that by 60. PRESTIGE POOLS AND SPAS 10416 WATSON ROAD ST. LOUIS MO 63127 314.821.6660 FAX 314.821.6669 www.prestigepoolsandspas.com Chlorine Stabilizer: Increases the life of the chlorine by 3 -4x. Desired Range o Salt Pool: 50 - 80ppm o Chlorine Tablet Pool: ONLY add 1lb per 4,000 gallons. Adverse Effects if Too Low: Chlorine levels will dissipate faster than usual.SKIMMER NOTES: Calculate your total pool volume first, then check the package of shock for dosing recommendations by volume. Typically for granular shock, yo...Shop Amazon for Safe-N-Clean Pool Oxidizer, 30,000 Gallon, 30 Day Treatment (1) and find millions of items, ... I have to put the entire gel pad in and it still only lasts about 2-3 weeks for my 1,500 gallon endless spa pool. But, no more floating black things. So, I'm happier with this product and was able to go out of town for 3-weeks without ...

What is Shock For Pools? Shocking your pool refers to the process of adding a high concentration of chlorine (or a non-chlorine sanitiser) to your pool water to …Test Your Pool Water: Before adding liquid chlorine to your pool, use a reliable pool water test kit to measure the current chlorine level. The ideal chlorine range for most pools is between 1.0 to 3.0 parts per million (ppm). Determine Required Dosage: Calculate the amount of liquid chlorine needed to raise the chlorine level to the desired ...SPP spring pool chemical kits include up to 4 lbs of Calcium Hypochlorite pool shock, but you may need more. In a clear and clean pool, the standard pool shock treatment of 1 lb. per 10,000 gallons is usually sufficient. For pools with visible algae or debris, additional pool shock is recommended, keep adding until the water turns a blue-gray color, …Pool Care and Cleaning ... How much shock to add to 15000 gallon pool? Wiki User. ∙ 2014-04-21 15:05:05. Add an answer. Want this question answered? Be notified when an answer is posted.It really depends on the size of your pool. A normal 25,000 gallon pool would require about 6.5-7lbs. of chlorine to bring it up 10ppm. Go to the link below for a chart on shocking.When you add muriatic acid to a pool, or any body of water, the acid will lower the pH level of the pool. Any acidic substance will lower a pH; lower pH is more acidic, while higher pH is more basic. For comparison, tap water that comes out of your faucet at home should be at a 7 (neutral) and an ideal pH level for a pool is around 7.4 to 7.6.May 26, 2023 · Multiply the number of ounces of shock required per 10,000 gallons of water by 0.3 (because 3000 is 30% of 10,000) to determine the amount of shock required for a 3000-gallon pool. If necessary, round up the calculated amount of shock to the nearest whole number. For optimal sanitation of your pool water, many manufacturers recommend adding 1 pound of chlorine per 15000 gallons.This means that for a 1500 gallon pool you should use at least 2 pounds (32 ounces) of stabilized granular chlorine each week. How Much Liquid Chlorine Needed For 10000. It is generally recommended for any pool owner of a 10000-gallon pool to use a single pound of calcium hypo for its shocking. Also, sodium hypo of 10 ounces alongside approximately 12.5% chlorine is required to sanitize your pool.The Proper Chemicals: -Add 1 lb Granular Shock OR 1 gal. Liquid Shock per 5,000 gallons of pool water. -Add an appropriate sized "Winter Chemical Kit" or the proper amount of Algaecide/Winterizer. (If adding our famous "Winter Pill," add this pill right before you put on your cover--read directions on the Winter Pill.)

Mar 12, 2023 · Generally speaking, you should aim for one to two gallons of 12.5% liquid chlorine per 10,000 gallons of water. You can try one gallon first and see how it goes before you decide to add that second gallon. For highly-green pools, go ahead and just use two gallons. Be sure to wear gloves and be careful not to splash the liquid pool shock on ...

Maintain chlorine at a minimum of 1.5 ppm and up to 3 ppm. The more swimmers you have and the warmer the water is, can double your pool's chlorine consumption. Add whatever amount of chlorine it takes to maintain a 1.5 ppm chlorine.. Oxidize (shock) weekly using 1 lbs. of Burn Out 35®, per 6,000 gallons of water.Just be mindful that most pools are sized with filters that run the water for over 8 to 10 hours. For sand filters, the turn over is approximately 2400 gallons per hour. It is recommended to turn over the water in your swimming pool at least one to two times a day. Run your filter more time during hot weather or heavy bather load and as a ...In a heavily used pool, as much as 90 percent of the chlorine or bromine may be working to eliminate organic impurities, leaving a mere 10 percent to kill germs. That is never a good thing. To free up a sanitizer to do its primary job—killing germs—it's always wise to periodically add a supplemental oxidizer, a "shock treatment."Its pH level ranges between 11 and 13. When sodium hypochlorite reacts with pool water, it creates hypochlorous acid that sanitizes and oxidizes water to eliminate pathogens. Depending on how much of the solution you add to pool water, it won't damage most swimming pool finishes, including: Aggregate. Fiberglass.A general rule is 1 pound of pool shock for every 10,000 gallons of pool water. Using that reference, you should use 1.6 ounces of pool shock in a pool that has …This video shows you everything you need to know about shocking the water in your hot tub. It features my new Lay-Z-Spa Santorini hot tub and demonstrates ho...For this example, let's say you have a 20,000 gallon pool and the pool pump has a GPM rating of 40. Grab your calculator to figure this out: 40 (GPM) X 60 (minutes per hour) = 2400 gallons per hour. 20,000 (gallons) / 2400 (gallons per hour) = 8.3 hours. In this case, the ideal pool filter pump run time is 8.3 hours per day for one circulation ...

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Pool Sand Filters; Swimming Pool Shock; Hot Tubs & Spas. ... should be added to the pool water at a rate of around 12 ounces for every 5,000 gallons of wate ...The standard shock dose is 2 lbs. (0.9 kg) of shock per 10,000 gallons (38 cubic meters) of pool water. If you're using liquid chlorine, this translates to 10 ounces (296 ml) per 10,000 gallons (38 cubic meters) of pool water. But this is a general guideline, and you may need to adjust the dose depending on the condition of your pool water.The Perfect Chemical Balance for a Pool Start Up. pH – 7.2-7.6. Alkalinity – 80-120 ppm. Calcium Hardness – 180-220 ppm. Cyanuric Acid – 30-50 ppm. Chlorine – 1-3 ppm. How much shock should I use to open my pool? To shock your pool, use 2 pounds of shock for every 10,000 gallons of water, which should raise your chlorine levels to 10. ...To shock your pool, use 2 pounds of shock for every 10,000 gallons of water, which should raise your chlorine to 10.0 ppm. Depending on your pool, you can use Leslie's Power Powder Plus or Leslie's Chlor Brite. After shocking the pool, run the circulation system for at least 2 hours before adding an algaecide.To use it, start by thoroughly cleaning your pool and checking the pH balance of the water. You should make sure that the pH levels are between 7.2 and 7. 6 before adding the shock. Once the pH is balanced, use a measuring cup or pool test strips to measure out the correct dosage of the shock. Generally, 1 cup of shock is needed per 10,000 ...Shocking the pool with chlorine and filtering the dead algae out. The amount of chlorine needed to clear a green pool depends on how green the pool is. It is better to overdose a pool with chlorine to ensure all the algae is killed. As an indication a very green pool could need as much as 150grams per 1,000 gallons.Above Ground Pools, Inground Pools, Pool Parts, Swimming Pool Pumps, Pool Pump Motors & Pool Pump Parts. ... Enter Your Pool Gallons: Current CYA Level: Target CYA Level: ... Poolside Chat Episode #19: Automatic Pool Cleaners and Shock – Do They Mix? February 10, 2016 Matthew Simmons.Once you have your pool's volume, divide it by eight to determine the number of gallons per hour (GPH) that need to be pumped. Most pool pumps go by gallons per minute rather than GPH, though. So to get that number, divide the GPH by 60 to determine how many gallons per minute (GPM) need to be pumped for full turnover. So your formulae will be:Shock Dosage: 2 gallons of shock per 10,000 gallons of water. How much liquid chlorine should I put in my pool per gallon? The basic balance of chlorine to water is between 1 and 3 ppm, or 0.00013 ounces of chlorine per gallon of water. ….

Apr 1, 2023 · Amount of Liquid Shock Needed = (10 ppm – 2 ppm) x (30,000 gallons ÷ 10,000) = 24 gallons. After calculating the amount of liquid shock needed, add it to your pool according to the instructions on the label. Remember to always handle liquid shock with care and follow proper safety precautions. The standard shock dose is 2 lbs. (0.9 kg) of shock per 10,000 gallons (38 cubic meters) of pool water. If you’re using liquid chlorine, this translates to 10 ounces (296 ml) per 10,000 gallons (38 cubic meters) of pool water. But this is a general guideline, and you may need to adjust the dose depending on the condition of your pool water.Enter your total pool volume and total alkalinity reading (from your test) below to find out what and how much to add. I've already pre-filled the desired total alkalinity level to 100 ppm, but if you're shooting for a lower or higher number inside the ideal range (80-120 ppm), feel free to adjust it. If your total alkalinity levels are too ...Introduction - How Much Chlorine To Add To 1000 Gallon Pool Need to keep your pool sanitized? People often wonder how much chlorine they need to add when refilling their swimming pools. If you're tackling this task for a 1,000-gallon pool, there's an easy formula that will help you find the right amount.The rule of thumb is to keep your free available chlorine levels between 2-10 ppm. Testing frequently will help ensure your pool’s water stays crystal clear and free from harmful bacteria. To keep a close eye on your pool’s water balance, use a reliable pool test kit. The best ones provide readings for total chlorine, free chlorine, pH ...The recommended dosage for pool shock is usually listed on the product label, and is typically based on the volume of the pool in gallons. For example, if the recommended dosage for a standard-sized pool is 1 pound of shock per 10,000 gallons of water, you would need 2 pounds of shock for a 20,000 gallon pool.To calculate how much bleach you need for shocking your pool, use half-gallon of bleach per 10,000 gallons of water for raising the chlorine levels by 5 ppm.; If you want to raise the chlorine level by 2.5 ppm, ¼ gallon of bleach per 10,000 gallons of water should be enough. Do the math to calculate how much ppm is required for your pool and ...Of shock treatment per 10,000 gallons of water. 5 x 10 = 3.8 ml of bleach. Powder chlorine is a little more expensive than liquid, but it has a lower ph level and you can buy it in stabilized form so that you dont have to add much cyanuric. First, use one tablet in the pool feeder. Per 1,000 gallons of pool water.As a general rule, 1 lb. of shock is used for every 10,000 gallons of pool water. Most shock is sold in 1 lb. bags, making it easy to calculate how many bags your … How much shock for 1500 gallon pool, Enter your total pool volume and total alkalinity reading (from your test) below to find out what and how much to add. I've already pre-filled the desired total alkalinity level to 100 ppm, but if you're shooting for a lower or higher number inside the ideal range (80-120 ppm), feel free to adjust it. If your total alkalinity levels are too ..., Basically, pool shock is an exciting term for oxidation. It's technically a type of chlorine, but don't let that fool you. Despite its categorization, it enacts a more specific function than simply sanitizing your pool water—though it does that, too. Here are the facts: after a chlorine particle attacks and kills bacteria or another ..., To properly shock a 6000-gallon pool, there are certain guidelines you must follow. Before adding any type of shock treatment to your pool, it's important to test the chlorine levels in the water using a test strip. Ideally, you want the chlorine levels between 1 and 3 parts per million (ppm). If they are higher than that range, then you need ..., For your backyard pool, free chlorine should be around 2-4 ppm (parts per million), ideally nestled around 3 ppm. For commercial pools, 3-5 ppm is fine. Do you have your reading? If so, let’s move on. Measure Your Pool Volume. Next, you need to measure how many gallons of water are in your pool. You can use my calculator below to figure that out., Generally speaking, you should aim for one to two gallons of 12.5% liquid chlorine per 10,000 gallons of water. You can try one gallon first and see how it goes …, The ideal salt level for a saltwater pool is 3,200 parts per million (ppm), but anywhere between 2,700 and 3,400 ppm is also acceptable. Anything below 2,700 ppm and the salt generator likely won't be able to make enough chlorine to keep your water properly sanitized. Much more than 3,400 ppm and your water can become corrosive to metal., Johanna Miller. Keep your pool crystal clear with three simple steps. Three types of chemicals -- chlorine, shock and algaecide -- are the basic chemicals used to maintain …, How much shock do I need for a 7500 gallon pool? It takes 1 ounce of chlorine in 7,500 gallons of water to equal 1 ppm. We will divide 30,000 gallons by 7,500 to get 4. It requires 4 ounces of chlorine to raise the parts per million of this example pool by 1., Jul 16, 2022 · Next, multiply the chemical change by the divided pool volume and the CC/FC difference . Convert the answer into pounds by dividing it by 16. This answer tells you how much pool shock you need to add. A good rule to remember is to use one bag of shock per 10,000 gallons. Recommended Reading: Don Johnson Pool And Spa. , Step 1: Test Your Pool Water. Before starting, test your pool water using a test kit to check the pH levels, alkalinity, and chlorine levels. The ideal pH level should be between 7.2 and 7.6. If the pH level is too high or too low, adjust it before proceeding., For optimal sanitation of your pool water, many manufacturers recommend adding 1 pound of chlorine per 15000 gallons.This means that for a 1500 gallon pool you should use at least 2 pounds (32 ounces) of stabilized granular chlorine each week. , Shock Treatment Ratio (per 100 gallons) Example: 500 gallons; Clear: 0.005 ounces: 2.5 ounces of shock treatment: Slightly Cloudy: 0.01 ounces: 5 ounces of shock treatment: Very Cloudy: 0.015 ounces: ... Pool Mate Spa Shock (chlorine, pH neutral) Clorox Spa Blue (restores blue color), Most of the one-pound bags of shock raise the chlorine level in a 10,000-gallon pool by 5-10 ppm; 64 ounces (1/2 gallon) of liquid chlorine (at 10% chlorine) would …, First off, the size of your pool will determine how much shock you can expect. Smaller pools will, therefore, produce less shock per gallon of water than larger pools. If you have a fairly small pool, you may not even notice a difference in how you feel after being in it versus being out of it. However, if you have a large pool, you may get ..., How much shock do I add to pool with algae? (1 bag) of shock per 10,000 gallons of pool water. That may be fine for normal conditions, but if you have a severe algae attack, a triple shock is needed. 1 bag will get reach 7-9 ppm, but for 30 ppm, you need 3, 4 or sometimes even 5+ lbs per 10,000 gallons of pool water., The only difference is that its concentration is different. Clorox bleach contains 5-6% while pool chlorine – 10-12%. From this, you can conclude that you will need twice as much bleach as chlorine to clean your pool. However, other factors affect this, which we will tell you more about below., Step 1: Test your water. Before shocking your pool, it's important to test the water to determine the current chlorine level. This will help you determine the amount of chlorine tablets you'll need to use. Step 2: Determine the amount of chlorine tablets needed., The Right Amount of Chlorine Shock to Use in Your Pool *For calcium hypochlorite or powder chlorine, 1 pound is ideal for every 10,000-gallon pool. In case of algae, triple-shock the pool by adding 3 pounds for every 10,000 gallons., Mar 29, 2023 · Most chlorine packaging will tell you how much to use to raise your water by 1 ppm per 10,000 gallons, but here’s pretty much what you can expect: Type of granular chlorine. To raise 1 ppm per 10,000 gallons. Dichlor (55-62%) 2.4 oz by weight. Trichlor (90%) 1.5 oz by weight. Cal-hypo (48%) 2.8 oz by weight. , The basic operation is to multiply your water volume (in liters) by your target ppm (i recommend 5-7ppm) However, your pool shock is 70% free chlorine so every gram you add is short 30% and to be accurate you have to account for that. If your target is 5ppm, you have to multiply 5 by 1.3 (this should come out to be 6.5)., Indices Commodities Currencies Stocks, Sodium hypochlorite contains around 125 g/L of available chlorine, so you typically need to dose a fair bit to shock a pool properly. As an example, for a 50,000 L pool with a …, First off, the size of your pool will determine how much shock you can expect. Smaller pools will, therefore, produce less shock per gallon of water than larger pools. If you have a fairly small pool, you may not even notice a difference in how you feel after being in it versus being out of it. However, if you have a large pool, you may get ..., The Right Amount of Chlorine Shock to Use in Your Pool *For calcium hypochlorite or powder chlorine, 1 pound is ideal for every 10,000-gallon pool. In case of algae, triple-shock the pool by adding 3 pounds for every 10,000 gallons., The recommended dosage for pool shock is usually listed on the product label, and is typically based on the volume of the pool in gallons. For example, if the recommended dosage for a standard-sized pool is 1 pound of shock per 10,000 gallons of water, you would need 2 pounds of shock for a 20,000 gallon pool., Indices Commodities Currencies Stocks, Use about 2 tablespoons of chlorine (every two days) to clean and maintain the hot tub water. Ensure that the chlorine levels stay between 1.5 to 3 ppm. If the levels are higher, wait for it to go down before using the hot tub. The high levels of chlorine are prone to irritating skin, hair, and eyes., Jul 7, 2023 · Step 4: Dump Shock in the Pool. After confirming that the pool pump works well, you can dump the pool shock solution into the outer edge of the water. Once you dump the pool shock into the water, allow the pump to keep running for at least eight hours. Grab a drink and relax a bit! , Finally got a larger pool then we've ever had, but it's still small. 475 gallons. Has a 300 gallon pump/ filter that came with it. I have no clue how to take care of anything like this without completely draining it, scrubbing it and re filling it every time and that's a huge job with a bigger pool like this. I just want it to stay as clean as possible without having to completely drain the ..., Apr 1, 2023 · Amount of Liquid Shock Needed = (10 ppm – 2 ppm) x (30,000 gallons ÷ 10,000) = 24 gallons. After calculating the amount of liquid shock needed, add it to your pool according to the instructions on the label. Remember to always handle liquid shock with care and follow proper safety precautions. , A 12′ has about 1500 gals, and the chlorine shock is usually 1 lb for 10,000 gallons, but for algae it is doubled or tripled for severe algae. So, you can add between 1/4 and 1/3 of a bag (4-5 oz) into the bucket of water and stir for about 1 minute, then pour into the pool. ... I’m running my DE filter 12 hrs a day. I have a ..., Once you have your pool's volume, divide it by eight to determine the number of gallons per hour (GPH) that need to be pumped. Most pool pumps go by gallons per minute rather than GPH, though. So to get that number, divide the GPH by 60 to determine how many gallons per minute (GPM) need to be pumped for full turnover. So your formulae will be:, For your backyard pool, free chlorine should be around 2-4 ppm (parts per million), ideally nestled around 3 ppm. For commercial pools, 3-5 ppm is fine. Do you have your reading? If so, let’s move on. Measure Your Pool Volume. Next, you need to measure how many gallons of water are in your pool. You can use my calculator below to figure that out.