Jul 21, 2012 #1 Fishfighter Aquarium Advice Activist Joined May 8, 2012 Messages 193 Ive got this crust on my live rock. It's brown but it's not diatom bloom, I don't think so anyways. I can't even scrape it off. Any ideas?
Ive got this crust on my live rock. It's brown but it's not diatom bloom, I don't think so anyways. I can't even scrape it off. Any ideas?