Bullet proof calcium deposits

[the_real_brian]

Originally posted by MitchReef
I thought about trying that, but was afraid of possible residues....have you used it on a tank that became a reef? This is going to be a mixed reef, primarily SPS and LPS....I don't want to poison them before I get them started....

CLR was the first thing I bought but I chickened out. I would hate to get everything set back up and then have the possibility of some kind of residue in the back of my mind.