Jan 27, 2014 #1 Ethan7474 Aquarium Advice Regular Joined Dec 1, 2013 Messages 98 What is this green stuff growing on my heater? Is it bad or is it normal? Should I clean it off?
Jan 27, 2014 #2 alco1 Aquarium Advice Freak Joined Oct 29, 2013 Messages 322 Location Victoira, Australia if its a new tank.... its completely normal. just leave it alone itll disappear on its own