Well, my own damn fault on this one. I was rearranging my tank tonight (since it's getting colder I gotta get all my boys into heated water for the winter and pack up the smaller tanks). Anyway, long story short I get all set up, release them, watch for ten mins, everything's fine.
Then my lovely silly indoor cat bolts outside. I went to go take care of her. (which was unsuccessful. That rotten kitty making me tromp around in the rain for half an hour).
I get back into my room, put on some dry clothes... and look over to see Calder and Scrappy both in Calder's section, and both looking rather beat up. And still going at it. I separated them both (it's amazing how a life and death battle can temporarily stop over a pellet in the water). I have dyi dividers, and I think I found the problem, a very small gap up by the filter).
No one's missing a lot of fin, though both of them have tears and pinholes. Scrappy is a little less active, though he's happily eating in his cup. He's a rescue VT and was just starting to regrow his fins (methinks someone dumped another male in his cup at the store).
Anyway, the offending fish are cupped. Care options? I have a planted tank, so even with QT cups I'm a touch leery about using salt on them. Any meds that are plant friendly that you can think of for me to pick up? I'll be switching everyone over to frozen bloodworms for all meals until they're patch up.