ajstank said:id say leave it, if the fish are used to it and hasnt hurt them then it may just be a good thing...is it java moss...java moss is really good for a freshwater aquarium...i have it in mine, and i love it
Tim Wheatley said:Rinse in tank water outside of the tank itself, scrub with something that hasn't touched soap
Tim Wheatley said:Search the forum for diatoms. That's what it probably is