Oceanicsublimat
Aquarium Advice Freak
I found this while researching macroalgae.. http://www.practicalfishkeeping.co.uk/pfk/pages/item.php?news=449 I think I may have some of this in my aquarium..it's really small so I can't tell right now..anyone have any problems whith this stuff? I don't know that I'm gonna have any hard corals in my tank.. will prolly start corals sometime next year or so..