The one that's leaning is probably suffering from some constipation (swim bladder disorder) so try some frozen peas (yes, like the ones you would eat - skins are fine to leave on).

The other may be having some fin rot issues. Does it look like there is fraying or possibly deteriorating of the fins? Or if not, could you do your best to describe exactly what you are looking at? Since he's not eating that's not a good sign.

You may not be acclimating your fish properly or you are choosing already sick fish. Either is a possibility.
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Phishie
Site Coordinator

"An ounce of prevention is worth a pound of cure."