Cory May Be Sick, What To Do?

[Tu13es]

I have a 29 gallon tank with 2 rust corys and 3 unknown type cory, as well as 6 zebra danios, 3 cherry barbs, 2 amano shrimp and a handful of ramshorn snails. The tank is heavily planted.

Tonight I came home and one of the unknown corys was sitting on a piece of decor not on the bottom of the tank. It's breathing, but I went in and poked it with a net a few times and it didn't really move. It's since moved, and upon closer examination I can't see any spots or anything. If anything, its eyes may be bulging a little compared to the others, but that's hard to say. EDIT: Upon further inspection, I don't think the eyes are a problem; another of those corys has ones like that and appears to be acting normal. Also, the cory in question may be a bit plumper than the others.

I have Maracyn I and II in my cabinet and I have a 10 gallon tank, heavily planted, without fish in it. Should I put the cory in the 10 gallon tank and treat with Maracyn? Or should I put him into a tub of water, throw in an airstone, and treat that way? Or something else?

 

[Tolak]

50% water change, slightly cooler water, splash the surface real good when filling. You could make the last gallon or so straight cold tap, the other occupants won't mind.

Keep an eye out for eggs the next few days, either on the glass, or in floating plants if you have any. Being unidentified they may be mop spawners, spawning mops are easy to make; http/www.djramsey.com/tropfish/spawning_mops.htm

Sounds like nothing more than a gravid lazy female to me!