Hello all - So I have been using the TFP method for 2 yrs with bleach and have been FLOORED how well it has worked compared to years of PS chemicals. So first, I want to say THANKS for all the valuable info on this site
Now - I have finally decided to take the plunge and purchased a SWG (Pentair IC-40) to my IG gunite pool - 18k gallon.
After so many years of keeping the CYA down - I see with the SWG the CYA should come up (60-80). My question is why is a higher CYA needed in SWG than in Bleach method?
2nd question - I have added Clorox brand CYA 100% (approx 3lbs) and my test kit still shows no rise - any ideas?