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 Thanks for all the advice guys, I started up the kalk reactor so we'll see what happens.  I'll make a very gradual change to the pH.  Every test kit I've ever used and the ones at the LFS as well were all showing my pH at 7.6 or thereabouts.  I know it's not a huge cause for concern and I wouldn't worry about it at all normally but last week I dosed kalk by hand a few times and I just found that the corals seemed to really appreciate it.  Was it the pH?  I don't know, but I'm dosing kalk now anyway so whatever! |