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That is awesome. Thank you very much

Thanks, is there a cheat sheet of chemicals you can buy at say Wal-Mart to raise/lower the various levels?

I just emptied and refilled my hot tub. It is a royal spa ~450 gallon hot tub. I add a package of instant bromine reserve, chemical to remove metal, and shock. Let the jets run for 30 minutes. 4 hours later I tested the water and not 100% sure on all the results. Bromine 10. (Need to...