nothing on the rock or sand, just on the glass, that's what is weird. We have a lot of hair algae on the glass and now starting to get some red. If it weren't for that other rock we could probably have some snails by now and get rid of the algae, it's making it hard to look in the tank, don't want to scrape it don't want to kill the little white looking creatures that seem to be eating some of the algae. Anyways, yes there are like clear like vine things coming out at the end of the orange looking like roots. Sorry the pic isn't that great it was on the glass and hard to zoom in on it. Like I wrote before there are 3 on the right side, one is about the same size of the one that I took the pic of, it wasn't that big yesterday. It seems they start to grow and then disappear or get eaten, not sure what. You don't think it's some kind of worm do you?