I'm in a similar situation pool wise, but don't know if I should start a new thread or continue my question here?
Always start your own thread. It prevents hijacking Butterfly
First, I'm new and ignorant to the ways of pools. I too have a high Cya number (Leslie's pool supply tested the water and it was 100+) so I assume continuing to try and shock or add chlorine at this point is meaningless. I stumbled onto TFS yesterday and I've learned a ton already...such as the Leslie's brand of DiChlor (which Ive added 12lbs in the last 4 days) just added more CYA.
Yesterday's pool test from Leslie's was - FC 0, TAC 0.5, PH 7.0, TA 20, CH 180, CYA 100
It appears that few of you experts here trust pool store testing...all the same, CYA is thru the roof. I don't have a legit test kit yet....
My plan - to hook vacuum hose up and sweep while having filter set to waste, so I'm getting gunky water out instead of just water. I'm going to try and get 1/3 - 1/2 of the water drained, then begin to refill. Thoughts? Do's or dont's?
Thank you in advance