im sad to say my two motoro rays passed away yesterday ! i havent been home for 4 days and my dad feeds them and left the uneaten food in the tank witch turned to moldie balls and the rays must have had a chew on them and got food poising. the water paramatas are all fine so this is the only thing i can think of ! i got homew and the rays were all curled up and it was like there skin was coverd in white slime and they were twitching and did not look well and in about an hour they boath passed away. ive had them for a good 6 months and they were growing great its sad to loose such amazing fish from my tank