I have a plaster/gunnite pool that is a dark, dark, dark blue color. I also have a SWG.
The paperwork from the pool builder said for "dark bottom plaster pools keep the pH at 7.2", but the guidance from TFP in the Salt Water Generator section says you should keep it at 7.5 - 7.8.
Who is right and why? (I think I know the answer, but why would the pool company tell me to keep the pH so low?)
It's a new pool so the pH is constantly rising, but I'm just trying to figure out where I should try to keep it.