feather duster & pineapple sponge
 

Hi All,
I have many small feather dusters and pineapple sponges in my tank. And they seem to grow and replicate very fast.
What conditions induce this rapid growth? Should I be worried about them taking over the tank?

I wouldn't worry too much. The feather dusters in my tank grow like mad but are harmless really.

harmless?
I think they are sweet.
I like to put a nice rock in my sump and have them accumulate on it ad then put it in the display...lol

I would say you should be encouraged by any natural growth of any desirable organisms.

I don't have a big problem with them. Although the too much of the feather duster tubes can look somewhat eerie.
I'm more curious on what they feed on and why they grow so fast.

Look really really close


http://athensohio.net/spongebob/pcSBS.jpg

I agree, they are a good sign.