Sick seahorse!!! Please help!!

[beatsbymd]

Hey guys, i"ve had my 2 tiger seahorses for about a year now. One of the stopped eating 2 days ago, and this morning she was on her side, breathing pretty hard. I did a water change, parameters are good, nothing has changed.
The other seahorse is doing great, eating, swimming....

I don't know what to do.....

I've checked her for bloating and external parasites and she doesn't have any of that.... :(

Any suggestions??

Thank you!!!

 

[Reefing Madness]

 

[AquariGod]

Bump ! Help this guy !

 

[Diamond1]

I don't know much about seahorses but this might be some help.
seahorse.org - Tankmates