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- Oct 21, 2019
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Hello! So I tested my water and my alk is 7.5! Today is water change day and I use reef Crystals by Red Sea the new salt water is 12 alk would a 2.5-5 gallon water change be okay to do? The corals are usually in 9 alk would this kill my corals? I feel like it would almost be like acclimating them to a new tank because I’ve bought corals that are from a tank with 11 alk and I run mine at 9 and they’re doing fine