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While waiting for my test kit. i used test strips to get TH. reading then multiplied that number times 2/3. to get an estimate of my CH. Don't know if this is correct? but tried it. I did the lower PH. and add acid for two days. and aerate. My #'s today: FC-3 TC-3 PH 7.5 TA-90 CH-90 CYA-40 Been...