First, where to find CYA: I got it at Lowes in MD, the Home Despots in the area didn't have much in the way of chemicals in stock yet. (I'll have to talk to my HD manager friend about that) approx. $10/3 lb.

Second: Tested tonight CYA up to 23. should I add some more to get in the 30-50 range? Other numbers FC/TC 2, CC 0, pH 7.8, Alk 150, Cal 350, Temp 81