Hot Tub Spa Chemicals – How to read your test strip ...
The first reading on your test strip (if you are using bromine aqua check test strips) is Hardness. If the hardness is Low you can get Foaming in your hot tub and deposits will accumulate on your pump equipment. To Increase the Hardness you need to use Spa Calcium to bring your Hardness level up. Your 2 nd reading on your test strips is Bromine.
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