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How can your pool have very high total alkalinity but very low pH?


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Answered 2008-08-15 19:42:49

For most residential pools, this is a trick question. One adds acid to reduce pH and Total Alkalinity. However, as total dissolved solids(TDS) build, say past 2,000ppm, pH of saturation will go towards 6.0. One can measure TDS, or use an estimating rule on when to change water to reduce TDS. To calculate days between complete water change, calculate ( Pool volume in gallons/3)/(bathers per day). For example, you have fifteen swimmers per day. Your pool is about 10,000 gallons. Then (10000/3)/15 yields: 222 days between changes. In a commercial pool, say you may have 100 swimmers per day in 100,000 gallons. Then (100000/3)/1000 yields: 33 days between changes.

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What do you use to raise the ph in a swimming pool?

the pH can be raised by adding an alkaline chemical such as soda ash (which also raises total alkalinity quite a bit) or borax (which has only a slight effect on total alkalinity), or by aeration of the water to outgas CO2 (which will raise pH with no impact on total alkalinity). Soda ash actually has very little effect on Total Alkalinity. Baking soda is the chemical to use to raise T/A.


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Why would the pool water turn black after filling if the chlorine and pH are good and alkalinity is high?

You would do better in contacting United Chemical in California. I don't have an answer for this one. Never heard of the problem before. Possibly very or extremely high amounts of iron or magnesium. k


If the Ph in a twenty-seven foot round pool is 7.2 how do you increase it too 7.5?

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How do you raise the pH in a swimming pool without affecting the total alkalinity?

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How much baking soda goes in the pool?

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It keeps your pH from jumping around from day to day. It is regulated by adding common baking soda that can be acquired inexpensively in any warehouse type food store. I generally add 10 LB to my pool in the spring and another 10 LB if the PH starts to fall too low half way through the season. HatawaRead more: What_is_alkalinity_in_poolsThere are a lot of rumors, myths and simply put, untruths when it comesto understanding alkalinity and just how important it really is.A close cousin of pH, the level of alkalinity in the water is a measurementof all the carbonates, bicarbonates, hydroxides and other alkaline substancesfound in the pool water.pH is alkaline dependent; that is, alkalinity is defined as the ability of thewater to resist changes in pH. Also known as the buffering capacity of thewater, alkalinity keeps the pH from "bouncing" all over the place.Low alkalinity is raised by the addition of a base (just like pH); sodiumbicarbonate is the most commonly used. High levels of alkalinity are loweredby the addition of an acid (again, just like pH).I recommend "pooling" the acid in a small area of low current for a greatereffect on alkalinity. That is, adding an acid will lower both pH and alkalinity.Walking the acid around the pool, in a highly distributed manner will typicallyhave a greater effect lowering the pH than the alkalinity.Pooling the acid has the opposite effect. A very importantcomponent of water balance, alkalinity should be maintained in the 80-120ppm range. Levels should be tested weekly.I hope this short message sheds some light on the relevance of alkalinity andwhy it's so important to properly manage it.Taking care of your alkalinity will help keep the other chems in 'check' and makeit much easier to manage the overall water chemistry of your swimming pool.www.fireyourpoolguy.com


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Is pool a popular sport in China?

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How do you ensure the safety and stability of swimming pool slides if you live in an area that gets very high winds and driving rains?

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What is a McCormick pool cue?

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Can Fireworks damage pool liner?

Sure, fireworks are dangerous. They burn at very high temperatures.


Can Baking soda bring up the PH in a swimming pool?

Yes, but, it may not be economical depending on how much is required. You are probably better off buying pH increaser from your local pool dealer. Pool & Spa Increasing the pH of the water without affecting the alkalinity is very easy, but there is a trick. With the pump motor on and water circulating, add the sodium bicarb. in the deep end of the pool and work your way around the perimeter. This will raise the pH with minimal effect on the alkalinity. Keep your pH around 7.6-7.8, not 7.2-7.4. Most "pool experts" tell you 7.2-7.4 but they are using an index that your local water company uses which obviously should not be used for pool. There's a big difference between a water treatment system and your pool. You can't treat them the same.


Do all salt water pools have a problem with build-up of the ugly white substance that requires pumice stone to remove?

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