I got home from work to find Chocolate (DTPK) on Ginzberg's side of the divided 10 gallon tank and Ginsberg (DTHM) on Chocolate's side.
Both have torn fins but no damage to their bodies that I can see.
After I scooped them both into cups with lids, my hubby and I examined the divider to see whether it might have come loose somewhere. We could not find any gaps, except that on the side of the back tank where the air hoses come in there was a small gap between the top of the divider and the screened lid that covers the tank. We figured out that if I put a 3 pound weight on the back side, air would still come through the hoses and there would be no gap between the divider and the screened tank top. (I put on an extra 3 pounds on the front end for good measure). Since both fish switched sides, both had to get past the divider.
I dosed with aquarium salt and have them both floating in quarantine cups for now. Chocolate probably does not need the QT cup because he is still pretty zippy. Ginsberg was hanging near the bottom in hiding places, so I think it would probably help him to rest near the surface.
I'm trying to decide whether it's safe to let them both in the tank now that I sealed the small gap in the back. Or should I get a separate tank? (Which would make 4 tanks to take care of).
Should Chocolate stay in the cup for the night? :sigh: I'm sad.