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Originally Posted by Josh23
calcium 280 ( low but I dont have any corals)
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All the more reason to wonder why? My Ca is (after 4 years) still over 400 - addressed with water changes and aragonite sand replenishment. Test kit okay?
I don't have SPS demanding corals, but I did notice a drop from 440 to 400 over the last year.
Have you checked your magnesium, and how often do you do your water changes?
Your high alk low ca is way off the equilibrium, and if you have been adding stuff, I'd suggest first getting it back in check.
Then you can do all the fancy stuff....
