Hi, I'm trying to understand why controlling pH has become so difficult since switching from a stabilized granular chlorine to liquid chlorine.
By keeping TA religiously at around 80 I barely needed a coffee cup of acid every three or four weeks with granular chlorine, but since switching to liquid chlorine I need a liter a week of acid to keep pH balanced.
At first I thought the cyanuric acid in the granular chlorine must have been keeping the pH low enough but I'm still maintaining the stabilizer at around 30, so that can't be it. Or can it? Then I thought maybe the pool surface was seeping calcium into the water but it's a fiber glass surface now, so that can't be it either - or can it? Is itt normal to need more acid with liquid chlorine?
Many thanks for any help on offer.