I live in Hawaii. The wind blows red dirt into the pool, this causes ferric oxide (iron stains). I have, thanks to this forum, removed a great deal of these stains utilizing the ascorbic acid method. However, because our water is soft the acid level rises and the alkalkinity drifts downwards.

I would like to keep the PH at 7.4 or below and the alkalinity at 100, to keep the staining to a minimum. How can this be achieved without constanly resorting to adding chemicals, any suggestions?

CYA = 30
CL = 4 (using Clorox Regular)
PH = 7.4
Alk = 100 (before adjustment for CYA)
Ca = 195
TDS = 340