What causes rays to quit eating

I know I'm not the only one on here that has dealt with a ray that just decided to quit eating one day... Or Atleast I hope I'm not 😳. What course of action have u guys taken in an effort to regain their appetite. I currently have a male marble that came to me skinnier then Most would consider healthy. He's a WC that has been captive for 2 years or so. He was eating fine for the first week or two then slowly tapered off to less and less... I didn't want to medicate but when he quit eating I decided to seperate him and dose with prazi. He's on day 4 now and will eat an occasional crawler or two... But doesn't really have a good appetite. Any input would be apreciated! I was told of a bacteria in the water that is always present and comes out when fish are stressed. I can't think of the name of it but it's common in catfish... Wondering if that it's not ich but it's more internal and likes to attack the vitals.


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Water params in the tank he came from May not have been favorable. It was only cycled for about 2 months prior to adding a pair of larger Rays... I figured the filtration could handle it but that may have been the issue. I'm going to keep him out of there until he has all his weight back and he will be joining my pup tank system which has a very elaborate filtration system on it that has been up and running a lot longer.hes had About 50-60 crawlers in the past week or so... I'm gunna just keep him rolling on those until his weight is back up. He will take the occasional shrimp but he's not overly excited about it...tried tilapia he's not havin it. Yet to try smelt that's next on the list. Strange because his female companion that he came with will eat anything and she's doing just fine in my 600.


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