Re: cacium hardness/ metal control new to me, do I need them
You do need some calcium in a fiberglass pool, but I wouldn't add that much. You can just keep what you have, I usually keep my calcium at around l50 - 200. I usually keep my ph between 7.2 and 7.4. Raise your alkalinity to about 80, the way CarlD says. Don't worry about tds. Carl is right with a cya of 80, you need a minimum of 5ppms chlorine, and a max of 10ppms and to shock you need 20ppms. So you may not want to use any chorine pucks (trichlor), because that will add cya. You can use calhypo - it will add calcium to your water with it. Bleach won't add anything but salt - which won't do anything to your pool. If you don't have any stains, you don't need any metal out. If you do see some staining, then you need to use something that sequesters metals. Feel free to ask any other questions you may have.
Northeast PA
16'x32' kidney 16K gal IG fiberglass pool; Bleach; Hayward 200lb sand filter; Hayward pump; 24hrs; Pf200; well; summer: none; winter: mesh; ; PF:7.5
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