Here's what Im doing, might help some others who are worried about this.
Im testing mixed saltwater for which I always have a 30 gallon garbage can to pre-mix saltwater with one of the pool or hottub test strips that contains ALK, pH and Chlorine.
I have a bench mark from my tank and a recent batch of makeup salt water.
Its a cheap test, about $5 for 50 strips.
Wendell
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