I am a newbie - last year was first year with inground pool and I think I did okay but I admit I have not been testing the water often recently other than PH. I just tested CYA for the first time in a long time and it was 90. I put a target of 45 in pool math and it says replace 50% of the pool water with new water. Is this the only solution??? I don't like having to spend money to replace that much water. If I have to do this should I do it ASAP or should I wait until mid May when I hope to start using the pool again. Please advise, thanks!
--- I just read in another post to not use chlorine tablets. Well I stopped using bleach and was using packets of shock (was leftover from previous homeowner so i was trying to use them to save money) to keep my chlorine level high enough over the winter and I guess that may have backfired?