Thanks, I've also read that you can get it by accident when putting plants in the tank but lol picking hydras from the main tank would probably take ages. It's safer to raise hydras separately as the fish might snack on them.Go and get yourself a few buckets of water from your local river or pond; you'll get all sorts of fascinating creatures. I can't guarantee you'll get hydra, but the odds are pretty good![]()

You could just leave a bucket of water outside for a few months; these sorts of creatures often turn up from airborn larvae or on bird's feet and the like.
My first hydra was in a jar of water that we kept outside in the yard![]()