Need to kill a yellow sponge

[John3]

I have a yellow sponge that came with my live rock from the gulf. There are other sponges (yellow, blue, black, orange, etc) that seem to be fine.

The yellow sponge in question is encrusting and has completely covered the bottom side of my top rock. It has now grown around some of the sides and appears to be killing some zoa colonies. The colony in question grew from 2 polyps to s good amount very fast but once this sponge came in contact it stopped spreading and looks terrible. The zoas are holding on but I believe sooner or later the sponge will take them out.

I tried peeling the sponge off but it’s not held together well and just breaks off leaving some behind which grows back fast. I can take this rock out but it does have 5-6 zoas types, ricordia, and a orange monti cap. So I need some ideas on killing this sponge without killing the corals. I would also prefer to not kill the rest of the sponge types since they are slower growers and have nice coloring.

 

[saltyfilmfolks]

Pull it out and scrub it. Light peroxide might help. Donit in a bucket container of old Tank water after a water change. Make sure to rinse (I half full two 5g buckets)
I’d also look to figure out why you have such amazing sponge growth.

 

[John3]

I was thinking the same thing on the growth. I have read normally they die out on their own but mine have done pretty well. I was thinking maybe someone might know a limiting nutrition factor I could try to target them with.

I’m due a water change tomorrow so it looks like it’s scrub time.

 

[saltyfilmfolks]

Silicates , carbon dosing , high amino foods, sponge powder.
Stuff like that.

Myself , I’ve been hoping for that kind of sponge response.
I want one of these bad.

Australian white lighting sponge. Those are a gorgonian growing on it.

 

[John3]

That’s really cool!

I did dose vitamins c for about a month which does coincide with some rapid growth of this particular sponge. I dose amino’s maybe once a week.

 

[Typical_Tim]

Silicates , carbon dosing , high amino foods, sponge powder.
Stuff like that.

Myself , I’ve been hoping for that kind of sponge response.
I want one of these bad.

Australian white lighting sponge. Those are a gorgonian growing on it.

It's actually a type of zoanthid, also be warned these are really tough to keep alive.