Quote Originally Posted by chem geek
Jennifer,

I just want to understand clearly. Are you now at an alkalinity of 110 or 220? Is the evaporation less because you've got the fountain on a lower setting? So now you have a balance between losing alkalinty through the aeration (and adding acid to restore the pH) and gaining alkalinity from make-up water for evaporation. Is that right? So your alkalinity is stable, but aren't you adding a lot of acid frequently to keep your pH down? I suppose that may be the tradeoff necessary.

Code:
Evap. --> Make-Up --> Alk. Up
  ^                       V
  |                   Fountain
Alk. Down                 V
pH Down <---- Acid <---  pH Up
Is that your cycle?

Richard
Last test alkalinity was 140 down from 160 due to lots of evaporation and high fill water. Yes this takes a lot of acid. What I have found is that vigorously aerating it seems I evaporate more water with out rising the ph faster. It could be that more water makes it over the side but the top rail seems dry??? When I get the alkalinity where I want it I just ripple the surface with the jet and even though I replace an inch or two a week it alkalinity and ph remain 110 and 7.5-7.8 with out adding much. I have never needed to raise my ph and my fill water has a ph of 7.5 Hope I did the quote thing right it's my first time.

jennifer