Help! My betta, Blue, has been acting listless all day and this evening, I noticed on the edges of his tail fin something that looks like fin rot! He's been holding his fins close and flapping his gills a lot and all he does is go up to the surface to breathe and then back down to the bottom.
Can someone who knows things about fish have a look at my picture and tell me if it is fin rot? And what to do about it? Thanks!
Oh, and if this helps, I've had him a week. Last night, I moved him from a 1 gallon to a 5 gallon tank w/ a heater and filter. The temp is about 79, ph 7.2, Ammonia 0 (or maybe 0.25, I'm not sure), Nitrite and Nitrate both 0. I also have 2 mystery snails in the tank with him and they seem fine.
I'm pretty new to fish keeping and I don't want to kill him, so any help would be appreciated!