Who Gives A Fish Forums

coltin wrote: ↑Tue May 20, 2025 9:50 am Hi and welcome to the forum. I'm having trouble seeing the issue on the pictures you provided, could you possibly post another one that focuses on the tail area? That would really help me get a better look.

I'd like to try and help you troubleshoot this. One thing you could attempt is gently lifting the fish out of the water and using a clean tissue to wipe the growth. This might give us an idea of what we're dealing with - it could be a fungal issue or something else entirely. If it doesn't budge, we might consider applying a broad-spectrum medication to the affected area, two times a day. To do this, you'd lift the fish out of the tank, apply a single drop of medication to the tail, wait 20 seconds, and then return the fish to the tank.