A friend gave me a pair of loaches. I've had them now almost 2yrs. Recently one of them has become bloated like she's constipated. She started getting blisters on her skin. I've never seen anything like it. I called the pet store and he said to give her shelled peas, sea weed, or spiriluna, I've tried them all, a couple of times she has looked a little better but a day or so later she's back to blisters and bloating. I'm not sure if she is eating any of it. But just when I think she might have passed on, her little nose is twitching like crazy, or even one day I thought that was it, went to grab her and she almost went flying out of the tank. She is still very active and other times she's on her back. I'm not exactly sure what to do next?? Help!!

Thanks Shannon