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My T-15 is constantly reading 300-500 lower than my K-1766 test. Is this ok? The cell is clean and it’s producing chlorine fine. This mismatched readings are just concerning me.

Hi! We had iron stains in our gunite pool a few weeks ago. Did AA treatment and it took about a week for water to get un-cloudy. Water tested great and was crystal clear for several days. Today we noticed a greenish tint to the water. Tested again, and again, numbers look good to me (results...

Just finished AA treatment for iron stains. Tested water just now after 36 hours. Chlorine is at zero and pH is 7.2. The article says raise chlorine slowly with liquid. My question is- how do I know how much to add? My pool is ~18k gallons. Should I turn my SWG back on as well? Thanks in...

Help! Our pool build was complete Feb 2020. Things have been going well with water chemistry until recently. We have been adding salt the past month or so as the cell keeps saying low salt, so we’ll add a bag or 2 to bring the numbers up and it will be fine for a week or 2, then it will show...

Hi everyone! I recently discovered this site and have been ferociously reading and trying to absorb all of the great info here! We are set to break ground on our first pool in the coming weeks and we are super excited. We are a family of 4, with kids ages 7 & 10. We are building an 18x36 IG...