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Start by draining the pool half way and refilling it. That should cut the alkalinity in about half, which is about where you want to be. When it's in the 100 to 120 ppm range, you should be able to adjust your pH properly without having to chase wild and frequent fluctuations. Chances are good that if you adjust the alkalinity to where it needs to be, the pH will be about right. You may not need to add any pH plus or minus at all. Don't waste all that water, though. Use as much as you can to backwash and rinse the filter!

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Q: How do you balance the water in an above ground vinyl-lined pool if the total alkalinity is at 240 and your pH is 6.8?
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Related questions

What is meant by the term alkalinity?

The word 'alkalinity' means pH values above 7


How do you balance the pH in an above ground pool?

Just go to your local pool supply store and ask for pH adjusting chemicals.


What are small bubbles attached to the side of the above ground vinyl liner and my water is green also?

Likely the bubbles are nitrogen, a by-product of the natural matter rotting in the bottom of your pool. The algae feed on this rot, nitrogen, and sunlight. You need to run your filter until this clears up, backwashing as needed (monitor pressure gauge to know when) and balance pool for Alkalinity, PH, and chlorine (in that order.)


Do black panthers live above ground or below ground?

They live above ground.


Does cabbage grow above ground or under ground?

Cabbages grow above ground


When was Above Ground created?

Above Ground was created in 1983.


What will reduce strong alkalinity without drastically increasing PH in pools?

pH and Alkalinity/Acidity are functions of each other. pH's above 7.0 are considered alkaline and pH's below 7.0 are considered acidic. So reducing the alkalinity will by it's very nature reduce the pH of the pool.


How do you lower the PH Alkalinity in a above groun pool?

use muratic acid to bring down Ph and TA


How does cotton grow underground or above ground?

It grows above ground.


How long should a vinyl liner last on an above-ground pool?

AnswerI had one and it will last for many years if you keep it clean and covered when your not using it mine lasted 4 years. Correct PH and alkalinity is importantI have been told by pool shop owners that keeping PH and alkalinity at the proper value will help get the longest life from the liner. Adjust alkalinity to 80 to 120 ppm first. Then adjust PH to 7.2 to 7.4. Check weekly. It is especially important that these values are correct prior to pool closing. AnswerAbove ground pool liners will last 6-10 years in most cases.


Do ginger grow above or below ground?

They grow above ground. It is a stem plant.


Does an above ground swimming pool require a lot of care?

Yes, above ground pools must be maintained regularly. The chemicals must be kept in balance, the filter emptied, and bugs and debris skimmed out daily. Sometimes the pool liner and filter sand may need replacing, as well.