Quote Originally Posted by coraline79 View Post
MG test= Magnesium? I was asking the guys at AD about this and said it would be hard to find one of these locally. Any ideas?
I can't say I'd bother testing for mag. I've done so over long periods of time and nothing I could ever do would cause it to be low, though I did raise it ridiculously high for some reason at some point... Killing bryopsis maybe??? I can't recall... Anyhow if your Ca and Alk are in check your mag should be OK IMO. If you've monitoring everything and your reef is aged properly I don't see any reason not to go ahead and load up on a few more inexpensive SPS frags but I'd wait a few months before buying anything expensive, like Tex said it can take a while to kill these things because they're pretty tough.