If your rays are only eating massivore and your not willing to work with them it will be hard for you to swich them over to it, but if you start feeding some other pellets like nls and such you will have an easier time. My rays started on massivore then when I got them to nls 10mm and nls 6mm and then I added the krill pellets which they took right away and then I threw in some of the super sinkers cichlid mix and they even ate those with no problems, I just take all my pellets and mix them together and fill up my nls buckets and then throw in hand fulls of the mix when I feed pellets now, but I am not going to feed massivore ever again.
I almost bought the 6 mil recently but went with the sure thing. Will have to try it, much better cost for what you get and Kens product are of good quality.
