It is vital to check to your CYA stage so that you can ascertain what FC targets to implement. If you don’t Have got a SWG, CYA is usually saved involving thirty and 60ppm. In case you have a SWG, CYA is usually retained between 60 and 90ppm (see notes). He was also a terrific instructor after we 1st completed the pool. I hugely advocate Finn’