Re: Algae Blooms Even Happen to Mods!
Very high chlorine levels can in theory bind to enough CYA to interfere with the CYA binding to melamine, but that would cause it to read lower, not higher. Some people say to use a chlorine neutralizer to avoid this, but it doesn't seem to be that necessary.
On the flip side, if the water has suspended particles, it can create more visible precipitation in the test so it's best to test the CYA level when the pool water is clear, though for people who didn't test before and have an algae bloom they don't have much choice.
So as you can tell, I don't have a good answer for you.
15.5'x32' rectangle 16K gal IG concrete pool; 12.5% chlorinating liquid by hand; Jandy CL340 cartridge filter; Pentair Intelliflo VF pump; 8hrs; Taylor K-2006 and TFTestkits TF-100; utility water; summer: automatic; winter: automatic; ; PF:7.5
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