Updated 01-12-2010 at 11:19 PM by Mits (Forgot to categorize)
I just took a similar variety out of my tank, they were like a plague attaching and growing EVERYWHERE, glass, overflow, you name it. I took the main colony out, but still have a them scattered throughout the tank. If mine were as pretty as yours, I may have kept the main colony, unfortunately mine are a bland brown/tan color.