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27,000 gallon 18x36 IG pool, vinyl liner, brown stains in the deep end and on the stairs. Both areas responded to a vitamin C tablet. I added 2.75 pounds of AA and waited about 4 hours, stains looked the same, as I added another .75 pounds (all I had left). The next day the stains were lighter...

I had a solar heater installed, and my pool pump is not strong enough to push to the water fast enough. It is going up 2 stories and through 3 seperate banks of solar panels (total of 12). Lots of air bubbles in the line, the installer took off the vacum relief valve and there was a trickle of...

I am doing an ascorbic acid treatment on a friends pool and also adding borates. Here was my thought: Add ascorbic acid, add sequestering agent, add boric acid, and balance TA and PH as needed. Does that make sense? My thought is the ascorbic acid is going to lower the PH, the boric acid...

I had bad iron stains in my vinyl liner pool last year. Pool store tested and said there was a "good amount" of iron in the water. I really wish I would have gotten the actual amount from them, but its too late for that... I did the ascorbic acid treatment per the instructions here. I then...