Help my molly!

[bblacrosse]

I have this Molly that I really love, and something is wrong with him. He is on the bottom of the tank, still breathing though, and he won't get up unless I poke him with the net. He will try to swim a few inches off the bottom, but then will sink and fall back into the rocks. If he does swim, along the bottom, he swims in slow circles, and he seems like he is struggling. Is it possible that there could be something wrong with his fin?

 

[Mumma.of.two]

Some more info will help.
Paramters? Ammo, trite, trate and pH?
Tank size?
When was last PWC?
Tank mates?
What does the fish look like? Clamped fins, spots, fuzz, bloated, etc?
Pictures?

 

[bblacrosse]

I will post pics in the morning. I moved him to a separate tank so none of the other fish would pick on him. All of the other fish in the tank were fine, so I don't know what's up. He might have something wrong with one of his fins, one of them wasn't moving when he tried to swim. His tank mates are:

2 small angelfish
2 other mollies
3 glofish