Quote Originally Posted by Zephyr View Post
Depends on the filtration. And cories ARE true schooling fish; they need groups of 5 or more.
As for the goldfish being dirty... For one it generally isn't good to keep a tropical fish with a coldwater fish; Jeffy might have caught a pathogen from the cory, no matter how long they've been together.

Yes, cories are schooling fish, but I thought we were talking about Jeffy? I thought the cory was fine and had been even when living with only his last tank mate as a pair. Maybe I missed something awhile back...

No, one shouldn't keep tropical with coldwater fish. However there are some fish that can be kept together without detriment to each other. Cories are very varible. Guppies, too, can live with various tropicals.

The pathogen idea is a good one. However, I'd think something in the past year prior to now would have surfaced. It's been quite a long time they've been together.

Any change in the brand of food? Have you painted recently? Stuff like that, Lori?