sponge question

[Frizz]

I have a large red ball sponge with zooanthids. It has been doing very well for about 10 months but recently I had a small cyno outbreak & some of the cyno got on it. When I blew it off there were some dead spots left on the sponge which now seems to be spreading. Is there anyting that I can or should do to prevent this. I realize that the dead tissue will not regenerate but I want to keep it from getting worse.
Thank you,
Frizz

[J. Montgomery]

The same thing happened to me a few weeks ago with a white colored sponge ball. When I finally killed the cyano with Maracyn, the sponge had decreased in size. Now that the cyano is gone, it seems to have stabilized.

I don't do anything specifically for sponges, and they seem to be doing fine all throughout my tank (all are LR hitchhikers).

[greenbean36191]

Without taking the sponge out of the water you should cut off the dead area along with a bit of healthy looking tissue around it. The decaying part will kill off the adjacent tissue in sort of a chain reaction.

[Frizz]

Thank you.
I hope I can do that without killing it :)
Frizz