Live rock with hundreds of feather dusters

[jadette]

I have a large piece of live rock with literally over 100 feather dusters on it and the surrounding live sand.

I first noticed some on the rock about 6 months ago, and they've been multiplying on a weekly basis. They're growing really slowly (the biggest one has a head that is smaller than a quarter when fully opened) and it's probably because I'm not feeding them enough... But how does one feed over 100 feather dusters without a risk of polluting the tank?

This is just one small corner of the rock... My sandbed is littered with them!

 

[LeslieH]

That's a small species of Bispira. Individuals probably won't get much larger than what they are now. Don't worry about feeding them anything special. They wouldn't be reproducing & growing if they didn't have enough already.

 

[iamwhatiam52]

I have the same ones in my tank with no problems.