I've got a zebra danio that lately has been isolating itself from the other two in my 10 gal
tank (these 3 are the only inhabitants). I don't have stats on the water condition, but from the antics of the other two, I don't think it's affecting them. I'll be getting the water tested in a few days though. Temp: 78 F, ph
7 is all I know at the moment.
This danio doesn't eat, at least not like the other two; it darts toward food, then veers away before reaching it. It also stays unusually still, near the gravel and seems to float around without much control, like it's weak, which I guess it is, as I haven't seen it eat for about 2 days. I saw it sort of thrash around a few times, but for the most part it just floats around.
There's no growth on its skin/eyes/mouth/fins that I can see, no white spots or anything. I may be paranoid, but there does seem to be a faint velvety whitish coat on its flanks, making its scales look slightly dull. Then again, maybe all danios have that and the other two just move too fast for me to really see them.
Should I isolate it? Get medication? Raise the temperature? Add salt?