2008pollyanna
Reefing newb
Hi,
My live rock appears to have lots of dark blue/purple sponge growing on them. The sponge like to grow on the least lit area of the rock. I think its sponge...it looks lightly raised, soft and velvetty. Alittle slimmy smooth to the touch. Even abit like a fungus type...small and some have a eye type mouth. Are they harmless? I know they dont live long...can they cause swings in levels? How do you get them under control if you have lots?
My live rock appears to have lots of dark blue/purple sponge growing on them. The sponge like to grow on the least lit area of the rock. I think its sponge...it looks lightly raised, soft and velvetty. Alittle slimmy smooth to the touch. Even abit like a fungus type...small and some have a eye type mouth. Are they harmless? I know they dont live long...can they cause swings in levels? How do you get them under control if you have lots?