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Showing results for tags 'cynanuric acid'.
I have a 400gal hot tub with cover in socal. It runs to maintain 103deg. I have had it for 1 month. I generally have to add pH increaser once every other week. I shock once a week with non-chlorine shock oxidizer but it does not seem to do much to increase free chlorine. I add dichlor every other day, sometimes every day when the spa is often used. The problem is Cyanuric acid increases everytime I add dichlor and I have to replace 50% of water every month when Cyanuric acid is above 100 to keep Cyanuric acid level under 50. What can I do to reduce maintenance time I’ve been spending on my