So I've been reading a lot on the forum to figure out why there is always still some black spots that look like dead algae at the bottom of my pool that I would have to vacuum up.
I guess my question is, why or when do we use chlorine tablets and other granulating stuff, knowing they will all eventually lead to the CYA being too high and have to drain the water?
I test the chlorine levels and it reads "2" on the Poolmaster kit and "0" on the test strips.
CYA is sky high at 100 or more. I'm pretty sure it is from the chlorine tabs and granulating chlorine powder from Leslie's.
I'm new to pool ownership and when I bought this house with a green pool, the Leslie guy told me to use those items and stack the floater full of 3" tabs. After the pool cleared, I'm trying to balance the water now and the CYA reading is way too high.