The Puffer Forum

Any ideas? It's a freshwater snail tank with no fish. These worms a very, very small (difficult to see with the naked eye). Here's a microscope view of one. They look like roundworms, but what type? Internal parasite, or just something normal in the tank?

The head gives it away, it's planaria. Completely harmless to snails and fish. It just means there are too many nitrates (wastes, food) in the tank.

Planaria is a constant battle for a lot of snail keepers, has happened to me many times. Snails produce so much waste that it's hard to keep up with them.

Don't use chemicals, just reduce feeding, remove uneaten food, vacuum often (daily).

Please don't double post. It's get confusing when different people answer in both threads.