Hello,
I am new to having an aquarium and need advice. I have a 65 gallon tank with three fancy goldfish, one other type of goldfish (can’t remember the specific type but has a normal tail) and one rainbow shark.
I was told at petsmart that the rainbow shark is really an algae eater and is not aggressive like it’s look-alike, the red finned shark. The fish have all been together for about two weeks with no issues. However, the past couple days the rainbow shark has been head butting and chasing one of the fancy goldfish (black moore). He ignores the others. Around the same time, we had some sort of bacterial infection get in the tank. Petsmart said our black moore had fin rot on the top dorsal fin and one of the other fancies had an ulcer. We have since been treating the water (about 3-4 days). The black moore’s fin seemed to be getting better but then I noticed the rainbow shark chasing her again and her fin is back to looking shredded, so I think it may be him doing it.
Why is the rainbow shark only picking on one fish? How can I stop him?
I am new to having an aquarium and need advice. I have a 65 gallon tank with three fancy goldfish, one other type of goldfish (can’t remember the specific type but has a normal tail) and one rainbow shark.
I was told at petsmart that the rainbow shark is really an algae eater and is not aggressive like it’s look-alike, the red finned shark. The fish have all been together for about two weeks with no issues. However, the past couple days the rainbow shark has been head butting and chasing one of the fancy goldfish (black moore). He ignores the others. Around the same time, we had some sort of bacterial infection get in the tank. Petsmart said our black moore had fin rot on the top dorsal fin and one of the other fancies had an ulcer. We have since been treating the water (about 3-4 days). The black moore’s fin seemed to be getting better but then I noticed the rainbow shark chasing her again and her fin is back to looking shredded, so I think it may be him doing it.
Why is the rainbow shark only picking on one fish? How can I stop him?