killing a white sponge ?

[sbaumann14]

should i kill it? or is it harmless? if i need to k.i.a., with what?

 

[tropills]

They are harmless. they filter water. so they are beneficial

 

[sbaumann14]

i have em overrunning some of my zoo's. was just a little worried

 

[tropills]

If they become to over crowding (the sponge) just peal it off the rock.

 

[tennisball]

do you have an angel cause some of them are big sponge eaters like the bicolor

 

[mudplayerx]

If the rock is easy to remove from the tank you can just lift it out of the water for about 60 seconds. This is usually more than enough to kill a sponge. If it is a large amount of sponge it will smell terrible once it dies.
If the sponge isn't growing over other corals I would just leave them alone. However, large growth of white sponge can be a sign that not enough water flow is reaching that area.