So recently about 3 weeks ago I got another marbled motoro. I got it from east coast zoo. They are generally trust worthy and do a good job with his rays. But what alarmed me was that he was fed love black worms and goldfish. So when I got him I noticed he was extremely skinny. I started feeding him earthworms which he happily took. He gain a little weight so then I tried training him for smelt/silversides. He didn't take then until last week. But since 3 days ago he stopped taking smelt AND earthworms. When I checked on him today he was a lot more pale than he usually is and he seems to lost a lot more weight than I first got him. His spine is showing. My female is perfectly fine. I checked the water and it's fine, but to be sure I did large water changes past 2 days. Any ideas why? I ordered prazipro from kens about 2 days ago so I don't know when that will come in. I feel like it may be internal parasites. Will api general cure work?! It's supposed to deal with internal parasites. Please help!