Hi, ive had my tank now for just over 2 months and all the levels and water condition are fine. I bought 2 rainbow fish on saturday and they've been fine since I put them in, very active, eating, etc but ive come home from work today and noticed that one of the rainbow fish has a white band across the top and below its mouth. Im new to the hobby so im not sure of certain diseases and by the time i'd got in from work today the aquarium had closed so I couldnt ask for advice. Ive scoured the internet trying to find out what it could be and ive found loads of info but theres quite a few things it sounds like but im not 100% sure and im concerned that im going to wake up tomorrow with a tank full of dead fish.
The fish has become very lthargic and is swimming closer to the surface than it has been and it also didnt eat when food was put in. The photo below shows the white mark around its mouth (sorry for the bad photo, its pretty hard taking good photos of even the slowest moving fish when your using a camera phone)
If anyone could give me some help and advice i'd be very very greatful. Cheers
The fish has become very lthargic and is swimming closer to the surface than it has been and it also didnt eat when food was put in. The photo below shows the white mark around its mouth (sorry for the bad photo, its pretty hard taking good photos of even the slowest moving fish when your using a camera phone)
If anyone could give me some help and advice i'd be very very greatful. Cheers

