Problem - fish hanging around filter vertically...

Hoontar

Small Fish
Sep 21, 2008
25
0
0
#1
Hey - my barbs seem to be spending an awful lot of time motionless vertically next to my filter intake at the surface of my new 20g tank. Why might this be?

Test kit indicates nitrite/ammonia levels are zero
Tank holds 1 small cichlid, 4 barbs (not overstocked)
Temperature is fine
Filter is a 20g aquaclear, running fine

 

Hoontar

Small Fish
Sep 21, 2008
25
0
0
#4
They are odessa barbs, decorations are minimal right now, since I just moved everyone over from a small 5g tank, it's a yellow lab cichlid, (juvenile around ~2 inches). Do they tend to hang out at the surface if it is too cold? or is there not enough oxygen or something? I've been using a big piece of cardboard to cover the tank while I wait for the hood to arrive...