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Have not Posted in 7 years as things have been going swimmingly (sorry:giggle: - just couldn't resist) since a successful battle with the dreaded CYA Have been pretty much adding same amount of liquid chlorine and acid when (PH gets high 7.5+) brushing on occasion and find that this summer...

CL> 10 FC 30.5 (turned milky white not clear clear- hope this is ok) CC .5 TC 31 PH 7.2 TA 150 CH - 1250 did it twice as I was just stunned - CYA +100 about 1/2" below the 100 line Pool looks clear as it ever was and pesky algae blooms seem to be under control As noted in an earlier post I've...

the 15,000 gal plaster pool w/ sand filter & pool vac ultra has been doing just fine with trichlor tabs 1x per week and occasional adjustment of ph. we're about 2 years out in treating the occasional algae(green in shallow shaded spots of the pool) with Silvertrine. was about to drop another...