Test the water quality daily to ensure balanced pH levels. Unplug your equipment. Don’t damage your tank filter or other systems by leaving them on while you change the water.

That's why the CDC and others urge pool owners and managers to test chlorine and pH levels all the time — they can change day to day based on pool usage.

What would happen if the pH level of all the water in my body dropped to 0? This question was originally answered on Quora by Kirsten Jacob.

Alkaline water is water with a pH greater than seven — pH levels range from zero to 14 and determine how acidic or basic a substance is. Regular drinking water is between 6.5 to 8.5.