I recently bought 3 zebra nerite from my lfs. I put them in a quarantine tank & have been changing the water daily as it starts to get cloudy. They came with what I think is either nematodes or planaria. They were hair thin worms ranging from a few millimeters to about a centimeter. I'm glad I quarantined because I just cant risk the life of my betta in the 10 gallon. Anyway I need help feeding these guys & figuring out what is coming out of my nerite. I have put a small tank with one of my tank decorations that had some algae on it with some tank water on the windowsill to grow algae. Any tips for growing algae? I also give them algae wafers daily, I just cant tell if they eat it or not. Most important what is this worm on my nerite? Is it its poop? It had dark, short, poop when they came home, when they had natural algae? It came out of the side of its shell. One picture shows the worm thing after it left, and the other picture is as the worm thing as it's coming out. This is different than the first worms, which were tiny, thin & almost gone now. Any advice?