Stabilizer is a dissolved solid and does not evaporate. They apologized and gave me one gallon of muriatic acid to add. If the pH is high, add one gallon of muriatic acid, which should be enough. This article addresses specifically pH. This will really come in handy, thanks a lot! In this case, lower the alkalinity with muriatic acid and then bring the pH back up using sodium carbonate (soda ash, not to be confused with sodium bicarbonate which is used to raise alkalinity) Soda ash increases pH only without affecting alkalinity. Question: How much sodium thiosulfate do I use to lower my chlorine level that is at 10 of my 35000-gallon pool? Question: My pool has 164,853 gallons. When using a chlorine pool, actively maintaining the stabilizer levels in the water is very important. The Oxygen Pools Program uses two components: A Dynamic Oxygen Generator and a weekly dose of the nontoxic, non-chlorine additive. A better test kit, or a DPD drop test kit, will use phenol red to give you a better idea of your true pH reading. The Pool supplier tells me that it will take some time till the ph stabilizes it’s a new pool. Have they been kept in a dry, cool place and sealed? I have a 20k gallon pool and have put in 2 quarts of muriatic acid because the pH and Ta are too high. Question: My pool ph was 7.8 when tested at the local pool place. The other option would be to try to hold the pool place responsible for this disaster and try to get them to correct the problem. Proper levels of stabilizer can result in Free Chlorine residuals remaining three to ten times longer in the pool water. High stabilizer also leaves the pool water vulnerable to organic contaminates and bacteria only this time the sanitizer is present just unable to oxidize the contaminants. There is no way of knowing the level without testing. They are stabilized, which also ensures that they will last for an extended timeframe in your pool. A pH of 7.8 is not very high. This will NOT harm the vinyl liner although unbalanced chemicals over time will have damaging effects. Can i easily do the same for this and if so, about how much inital chlorine and/or muratic acid would I need to use for about 4-5 volume of water? The only advise I can give would be to use a test kit. Without stabilizer in the swimming pool, the UV rays of the sun will leave the pool with zero free chlorine in just a few hours. I am also very confused why a pool place would tell you to add 15 lbs of pH down when the level is at 7.8. Is it a liquid drop test? Thiosulfate is very effective in chlorine reduction and it doesn't require much to lower the chlorine level. Free Chlorine(FC) levels >10ppm should be avoided until it drops. If by some bizarre miracle your water comes out at this level, you don’t need to do anything to your pool! Rob Hampton (author) from Port Richey, Florida on April 09, 2019: Laura, Citric acid is not used to drop pH. Swimmer discomfort comes mostly from high levels of Combined Chlorine(CC) and unbalanced pH. If you've added 15 lbs of this to your pool, the pH level is dangerously high. Pool Chemical Calculator - Simple Pool Calculators For Easy Pool Management, A Chlorine Free Water Treatment For Pools. To lower alkalinity, add muriatic acid. Hi we just started our own pool company and I had no idea pH is usually the problem and not high chlorine levels. "pH" stands for "protens hydrogen" or "power of hydrogen." 24 hours later, there is no change in my test numbers. High chlorine can also be an issue. It’s a salt water pool. Try this chemical dosage calculator to adjust chemicals. There is an industry wide shortage partially due to a large fire at the BioLab facility as well as to the ongoing impact Covid-19 has had on production. With a liquid drop test kits, the test reagents have a shelf life and can give false readings. After adding the acid, allow at least 1 hour of circulation. Chlorine is 2/4, pH is 8.4, alkalinity is 40, hardness is 150 & cyanuric acid is 50. Question: My above ground pool has a pH of 8.4. Make sure the test kit you are using is working. If you've added 15 lbs of this to your pool, the pH level is dangerously high. For a detailed explanation of the NIGP Code used, please visit our NIGP Code Explained webpage. This also plays a key part in maintaining the water inside a pool balanced. It is often difficult to obtain a satisfactory ORP reading in an outdoor pool stabilised with cyanuric acid. Adjust sliders to calculate pool stabilizer. If you are using test strips, it's usually hard to determine exactly how high the pH level is; you just know it's high. Question: What do I do when my pool pH is good and the alkalinity is high? Answer: Alkalinity is best between 80 - 120 ppm. (a) If cyanuric acid is used to stabilize the free residual chlorine, or if one of the chlorinated isocyanurate compounds is used as the disinfecting chemical, the concentration of cyanuric acid in the water must be at least ten milligrams per liter, but may not exceed 100 milligrams per liter. Answer: If the pH is still 8.4 after adding a gallon of acid, there is a more severe chemistry issue. Besides, vinyl liner pools are super budget-friendly, and building it takes no longer than 4-8 weeks. I'm tending to my sister's pool while she's out of town - I put a full gallon of muriatic acid in the pool like she said - but she didn't mention waiting, or testing. Many things can affect the pH balance in a swimming pool: To lower the pH, the most common liquid acid used is muriatic acid, also known as hydrochloric acid. But in these cases, an unbalanced pH level, not a high chlorine level, is almost always the problem. When it's high, you may need to dilute your pool water to bring it back into the ideal 40 to 100 PPM range. Question: How can I lower the alkalinity level of my pool? I have a waterfall feature about 5' in length, 3" deep and 4' high (that's just the waterfall portion)..Where the water falls into is about 3.5' wide, 1' deep with a 1' depth (it's basically a rectangle tub where the water falls into it and is pumped back over the waterfall).--nothing swims in it. Certified Pool Operator Math Questions. When using chlorine with stabilizer added its important to keep an eye on the stabilizer levels to prevent it from getting to high. Please make sure this is the correct volume. Cyanuric acid, or CYA as it is commonly called (and also called pool stabilizer, pool conditioner, or chlorine stabilizer), acts as that buffer, protecting your chlorine from those hungry UV rays. Save pool equipment configuration. Don't worry that you may have added a little too much, because the pool can be a little acid (low pH) for swimming purposes but still at a good pH for shocking. The alkalinity can be lowered using muriatic acid with the problem being that it also lowers the pH at the same time. Answer: 164,853 is a very large pool. Low stabilizer leaves the pool water vulnerable to organic contaminates and bacteria without proper sanitation. Starting ph is 7.2 in 2500 gallons of water, how much citric acid is used to drop ph to 5, I just added half a litter off acid hydrochoric into a friends pool as they have been away for 3weeks how long until i can swim in it, it was still clear before i add the acid. Answer: Muriatic acid will lower the alkalinity. It is still green, and the pH is still at 8.4. It is still milky. Very little acid is needed to adjust pH in a spa. Use sparingly and according to directions based on pool water volume. Some water will be lost during this process. 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