Thinking of setting up my first salt tank

[Ephraim]

Good point, i never even thought of the metallic content. Would Tufa have the same problem? I have a ton of that lying around to that I'm probably not going to use anytime soon.

If the fish will benefit the corals, then I'll look at keeping a few fish as well, maybe some blennies or gobies. I can keep a blacktip reef shark in this size tank right? (j/k)