ocellaris clownfish lazy or sick?

[errattiq]

Hey everyone, I have another question for you clownfish guru's out there. I have a 55gal system, 0 nitrite, 0 ammonia, 5 ppm nitrate. I have a yellow tang, and a few ocellaris clowns (all tank raised). Usually they are all over my tank, but one of the smaller ones is hovering where he sleeps, in the left rear at the bottom of the tank. He did eat something today, but he's just swimming upward about an inch above the sand and staying there. I've never had a problem before, these fish have been together almost 2 months w/o any problems...Any thoughts?
-Thanks;
Josh P.

 

[ophiura]

In time,a pair will dominate, and many of the singles - weaker or just "losers" will be killed off, IMO. So it is possible it is just sick, it is possible it is being sent into submission, but overall I would not expect several to work long term.

 

[janastasio]

I had four in a tank at one time, all purchased together. Eventually, I had one that kept getting picked on by the others. He pretty much always stayed in one area. I ended up splitting them into pairs in two different tanks. Much better!