Mag question
All my levels have been pretty spot on but in the past I never checked Mag all that often because every time I did it was like 1300-1400. Recently I bought all new reagents for my test kits and tested them all. Alkalinity was 175ppt, calcium was 465ppm, but my mag was at 880!! What creates this situation? I never really added much mag before and the levels seemed to hold. I do weekly water changes and assumed the salt mix was keeping my mag levels good. I guess not!! Any thoughts?
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