I will be using ascorbic acid to remove iron stains from my vinyl liner(as per the instructions on this forum). I just opened my pool and I'm sure my chlorine is at zero as I have not added any since last fall. All I have done so far is turned on my pump, vacumed and added 25oz of polyquat-60 I have not tested any levels yet. The water is clear.
Before I add the ascorbic acid should I get my ph and alkalinity within a certain range? If yes, what levels?