I have read on here about caution against using tri-chlor pucks because of the CYA. I like the idea of the convenience and price and am not too concerned about the CYA because I can check it with my Taylor test kit. Are there any other downsides? I need about one puck per day for my 30,000 gallon vinyl pool. How long would it take to raise the CYA by 10 ppm?