Black Sponge

[plutoniumJoe]

Originally Posted by intarsiabox

Yes, mine have never tried to escape. I meant invasive of coarse.

Good to know. I kind of like them they provide a nice contrast to some of the richer colours in the tank.

[RSM]

I've had black sponges in my sump for over two years now and forgot about them until I read this! Hasn't been an issue.