Originally Posted by spoonman
Could you possibly have added fish that he has to compete more for food?
I don't think so. I only have one other Danio in there after my other two died, and three peppered cory cats. I've been worried about adding more danios after the other two got sick and died.
Originally Posted by hacket
How long did it take for this to happen? Has it happened to other fish along with this one at the same time? What are your water parameters?
It happened over the course of a few weeks with this fish, the other fish died much quicker. Only one fish got sick at a time.
Here are my water parameters:
Also this morning the fish only ate about 3 flakes of its food.
I don't know what could be wrong. It might be Ich but only the one fish is sick.
Right before they died the other fish looked like the fish on the left in the picture below.