I got new three 1 1/2 inch comet goldfish for a 30 gallon tank just two days ago. The water is clean and the temperature is about 65-70 degree(it's room temperature since the heat's turn up). The filter and air pump are running constantly.
Anyway, I got the fish from Petsmart and they all seemed healthy(with no damage to the fins or anything), active, and hungry(the way all goldfish are). Today, three days later, one of comet suddenly starting sitting in the corner by itself all still and stuff and when it does swim(when we urge it to by tapping gently on the tank glass), it seemly to be struggling to stay up. There are no injuries and it's definitely not swim bladder, or anything, and all the others were just fine and healthy. Is this normal? I think it's dying...
Anyway, I got the fish from Petsmart and they all seemed healthy(with no damage to the fins or anything), active, and hungry(the way all goldfish are). Today, three days later, one of comet suddenly starting sitting in the corner by itself all still and stuff and when it does swim(when we urge it to by tapping gently on the tank glass), it seemly to be struggling to stay up. There are no injuries and it's definitely not swim bladder, or anything, and all the others were just fine and healthy. Is this normal? I think it's dying...