Hello all. I've browsed this forum here and there but until I recently purchased a decent test kit I didn't think it would be proper to ask questions. Well, I got my kit and the first thing I did was test CLA. It is off the charts high. Even diluted I get about half way to the 100 mark and I can't see the black dot. I bought this house from my parents and they've always done the minimum on pool maintenance. Chlorine tablets were their best friend, with them usually keeping 3 of them in the pool at a time. Well that probably explains the extremely high CLA. Looks like I'm going to be doing some draining but I need advise on technique. I read to not drain it below the lowest step. Pool water is very warm, so should I drain and then refill several times or should I drain while filling from the other side? When do I test again?