I have a few sponges that are starting to get a little out of control. One is yellow and sort or bulbous, the other is white and just grows in one layer over the rocks. I haven't worried about them, but they are starting to crowd some of my zoas.
Is there a good way to remove them? I pulled out one of the rocks to scrape of one of them, but the entire bottom of the rock was pretty much covered, so I'm sure it would just come back. Has anyone ever picked up a sponge eating nudi, then passed it on once the sponges were gone?
I can't figure out what they are even feeding on. I feed everything in the tank with a skewer, so there's almost no extra food waste.