This article was sponsored by @MarineDepot at www.marinedepot.com. Introduction The marine environment is one of the most complex systems on the planet. The aquarium you are about to set up is only a tiny sliver of the vast ocean, but it is no...
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Welcome to R2R! While the preferred calcium levels are lower, I don't think I've read anything indicating issues with calcium at higher levels in the 500s. High alk can burn some types of corals. I'd go for smaller water changes as you try to bring the alk down, maybe 5% or 10%.
Too much calcium will affect the values and cause stress on your fish and invertebrates. It can also cause your fish to grow more slowly and swim erratically. You will want to keep calcium between 400 and 450 mg/L. If the levels get too high, the calcium can cause the pH to rise to dangerous levels, since most forms of calcium are alkaline.