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Thanks! So do people just generally ignore the large negative number, or is there a better negative number target, or just keep it negative? :) Right now I just try to keep them in ranges I've gotten from here, the pool installer, and other sites (which typically agree), though total alkalinity...

I'm a new pool owner, and so far it has been great. We are watching the chemicals and having reasonable luck keeping things balanced (I think). I've read that since I have a vinyl liner pool I do not need to add CH (mine is down around 50). Since I have not dong anything with that my CSI/LSI...