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Is that enough to replace calcium/carbonate hardness/magnesium back to acceptable ranges?
I had been doing 25% weekly water changes every week up until lately i've been doing it once every two weeks. I tested about 3 days ago and my calcium was 400. Very acceptable but I dosed it back to 420 because I had never seen it that low, lol.
I was using whatever was on sell but I want to stick to one brand of salt not change it every so often like right now I have coral life salt but idk if it very good....