Hi, my calcium hardness level appears to be low for my plaster pool, but CSI seems to be ok.
temp 60 deg
CSI turns out to be -0.05. I have a 4500 gallon spa with a plaster surface.
1) Is it essential to raise CH levels if my CSI appears ok?
2) lf I wanted to raise CH, can I just use cal-hypo tabs to do this which will reduce the amount of bleach I have to add as well?
3) How long will it take for the cal-hypo tabs before CH level is appropriate?
4) Also, I've read dissolving cal-hypo in a bucket then pouring it in, but can I instead use one of those pool floaters and just place some tabs in there to distribute the cal-hypo slowly?