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Showing results for tags 'chlorine demand'.
Greetings everyone, I've been researching on how to best take care of my new 400 gallon Cedar Hot Tub. It's just over two months old. I've been using chlorine for sanitization, trying to keep it within the recommended 1-2 ppm, and never greater than 3 ppm. Too low I have a sanitation problem - Too high I risk wood damage. It has an ionizer installed which is not being used yet until the tannins are no longer leaching into the water.**1 The tannins are now vastly reduced. The water looks clear to me now. Even the filter canister water looks clear. It used to be a very brow