What is this? Clear Slime

[Cribs]

Can anyone tell me what they think this might be? Seems to be growing. It’s deep in the rocks, and feels like nothing to the touch, I almost can’t even feel it when I touch it with my hand.

Really would like to get rid of it.

Thanks!

[bribo12]

Looks like sponges to me. Does it rub off when touched?

[Cribs]

I’m not sure what you mean, but they actually get stuck to my snails that go through it.

When I clean them up, it’s pretty unsubstantial, when removed from the water you almost can’t even tell it’s there.

[Sniperhank]

Looks like tubes of filter feeders of some sort.