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I was thinking the sock with di or tri b/c that would address a few levels but want the expertise of you all 1st.. FC: 1 CC:2.5 CH: 225 PH: 8.2 TA: 140 CYA: 0 Thank you! Happy swimming all

Hello... Helping out a friends pool here.... She has an auto chlronitaor but I'm assuming it doesn't work Bc there was no FC registering. Also cya doesn't register either. So my question is should I raise cya before SLAM? I'm using the recommended test kit It's a brand new 15 round pool D.E...

I have 15 round above ground w/ vinyl About 5000 gallons Filter is D.E. No heater FC 0.4 ppm TC 2.52ppm CC 2.12 ppm PH 7.6 Hardness 164 ppm Alkalinty 121 ppm Copper 0.3 Iron 0.1 PHOSPHATE .... Way over at 2282 ppb Last the cya read was.... 113 ppm As a result I have a purple sand like...