+1 chopped earthworms! I know alot of people say bare bottom tanks for rays works but in my opinion the only defense the have is their tail and their ability to bury......denying them the option to bury has to ultimately cause stress may wanna get some pool filter sand so it can get comfortable and adjusted to have the best chance to bounce back
Sent from my SAMSUNG-SGH-I317 using MonsterAquariaNetwork App