My water looks amazing now thanks to what I have learned here. Today's readings just before adding liquid Cl:
CYA 45 (after *four* water replacements, ugh!)
So my CSI according to poolMath is around 0.09 which is in range. But CH seems like it shouldn't be @ 150 like mine. Now, my diamond brite (or whatever it is) is in terrible shape, coming off and every time I clean my cartridge it's full of "diamonds". We know it needs to be redone but we're not quite ready yet. My question is ... with the surface in bad shape, should I go higher on CH to protect it till we can refinish or what?