I cannot get a picture of these guys, look like dirt in the pictures. But they look like poo... Or dirt. They seem to be attracted to my driftwood, algea grows best there so I thought it may eat it. I discovered them this morning when the poo that I was trying to clean swam away! Any ideas? I poseted in the planted tank section because I want to put plants in the tank and I fear they might eat the plants. It is a 10 gallon. There is only a single betta, pretty little thing. I did have a single ball or morimo but I removed it out of fear. What are they? Will they hurt the tank? Is it a bad thing that the betta eats them? Help!