I finally got my Hystrix rays on Massivore. For the longest time they would just glide over it and completely ignore it. Last night I put in 5 pellets, they were gone in 20 minutes and today as they were falling the rays were jumping for them.
I offered them food everyday. When I switched to pellet and they didn't eat I gave them shrimp, then I figured its pellet or nothing, they starved for 1 day then started eating the pellets. The only thing is I noticed the pellets funk up the water, all the parameters are in check but it stinks