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I am also reading zero CYA both at the local pool store and using my Taylor K-2006 test kit. I've added about 3 - 4 lbs so far, first dissolving in a sock in the skimmer, now using a nylon stocking hanging over the side of the pool so the return is flowing through it, which is dissolving the...

Last year was my first year with a pool. The previous owners used a Nature2 system. I went BBB (simply didn't pop in a cartridge) and didn't have any problems.

Thanks for the fast responses. This forum is excellent!

If I go with Cal-Hypo for chlorination while I'm trying to increase my calcium hardness, how do I apply? Will leaving granules in the skimmer affect the pool and/or liner? An ad for a competing product said Cal-Hypo causes cloudiness - myth?

Does my Hayward sand filter care about calcium hardness?

After taking the cover off last week, starting the pump and vacuuming about 60% of the dirt off the bottom, the pool is starting to look good. So far I've only added bleach (about 6 large jugs of 6%, about 1 a day). Took a sample to Leslie's and here are the numbers: Free Available Chlorine...