I'm still a newbie but my pool and numbers look great. My brother-in-law is a long time pool owner that follows the pool store guidelines. In his defense, his pool always looks great. He knows I am a fan of the TFP method and that I have a "fancy" test kit. He is out of town and we are house-sitting and he finally agreed to let me test his water. He floats pucks and is constantly dumping in lots of chlorine so I kind of had an idea of what I might find:
pH 7.4 (he had just added MA the night before)
TA 825+ (the sample never turned red, only an orangeish color so I stopped wasting reagent-not sure if this is accurate)
CYA 200+ (I followed the instructions for when high levels are expected)
He has a plaster in ground pool, uses chlorine and it's around 8000 gallons.
I'm not going to offer him any advice unless he asks but in case he does, what would the experts advise? I did leave him a note with the results and the recommended levels for his type of pool. He is a very intelligent guy and does have a background in water filtration/treatment so he's heard of the issues with a high CYA level but admitted he hadn't tested for it in years. Also, I think the OTO test kit he has is incorrect as he told me he had just tested his chlorine level and it was 3 so he thought everything was fine.
Again, I'll only offer advice if I'm asked but want to be able to give an intelligent response