I did a partial drain of my pool (25k gallon pool) last year being that the tds level was over 3k. I drained about 3/4 if not more.
This yr again my pool is getting black algae spots though my water clarity is really good. The first and only test from Leslie's indicated that my pool again is at the 3k TDS levels. why? I clean my 4yr old cartridge filter at least twice per year (4 cartridges).....though I usually wait until the water clarity is not there any longer.
I will get my water tested tomorrow....why do other home owners get away with not draining their water for years and I'm suffering again this year? What gives?
I will come back with the leslie results tomorrow.