I'm so upset and shocked at what happened tonight. I've had my ten gallon separated with a divider since May of last year(without any problems) and I only had nightmares about this type of situation occurring.
After getting back from dinner I discovered Calypso had somehow got through the divider and into Rousseau's section. I was horrified and ran into panic mode to separate them as quickly as possible. Rousseau only had 2 tears in his fins, which appeared to be minor and was acting normal. Calypso on the other hand, seemed to have lost the fight. His fins were destroyed, he was swimming erratically, extremely stressed, the odds didn't look good. Sure enough after only 5 minutes, he stopped moving and died.
It's like my worst nightmare, and I feel so horrible. I checked out the divider and it's in its normal place, nothing out of the ordinary. I can't figure it out. All I know is I just lost my confidence in dividing any of my tanks. Never again. I don't want to lose fish like this.
Rousseau is still swimming around, looking okay. I hope with salt baths his fins will heal and I definitely hope he makes it. Any other suggestions on what I can do for him? I'm just all shaken up by this.