Animal-Chin said:They are actually a type of snail that never moves. They aren't bad but they will eventually throw out a web to catch stuff from the water. I took mine out cause I didn't like looking at the webs they cast. I just snapped them off....
Gregcoyote said:I use to have these all over. Looked like spider webs. My wrasses have eliminated them permanently. Wrasses can be a pain, but they do a real job on worms and pods.
Gregcoyote said:That's right on. I have a school of them and their efficiency makes a mandarin look like a homeless guy with a shopping cart.