- Do you know of and understand the Aquarium Nitrogen Cycle?
Hi everyone I have a male GBR his name is Franklin. I’ve had him since July 4th last year so going on 8 months! I recently noticed a bump under his lip and off to the side a bit, well this morning when feeding him I noticed a little bit of red like it is a wound possibly. Occasionally during feeding time he will chase the Otocinclus away so I don’t know if he possibly injured it on something or if it’s actually something internal? Anybody with experience if you could please help I have general cure and em erythromycin. I just want to know what I should be treating for! I don’t want to lose this fish by throwing medicine at him he doesn’t need! His tank mates are 4 otocinclus and 4 harlequin rasboras, and 2 random male endlers In the second photo I put an arrow pointing to the sore you can see it in the first photo as well.