Hi:
My poor comet has come down with something but I'm not sure what it is. About a year ago I treated him for an internal parasite infection because he was pooping white feces. But this time I haven't seen his feces so I don't know if it's the same problem.
First his symptoms: except for feeding time, he goes to the back right side of his 29gal tank (which he shares without another comet, two cories, and a pleco) and lays on the gravel for hours without budging. This is atypical of his usual which is to spend atleast two hours after feeding swimming thru the tank and sampling the gravel for food and then he usually "retires" to the top and rests until his next feeding. He doesn't appear to be gasping for air but he's opening his mouth wider each time he does breathe.
I checked the water params to rule out ammonia/nitrite problems and both readings are at 0.0 with nitrate around 20ppm. I've had him for close to 3 years and really haven't changed anything in his routine for well over 2 years.
Thanxs for any assistance - I'm really at a lost.