I feed new life spectrum 10mm for my rays and they absolutely love it they prefer the size since they are larger rays but even when smaller they chow down on it. Massivore is like crack so your fish will be addicted to it. Really try to switch them and tell me its not a drug. But starve them and give them a little time to understand other foods exist and they will then eat any type of pellet.
Its funny while on Massivore for a long time they will only eat Massivore and nothing else when on nls they will eat just about anything and not be so picky.
I feed a mix of kens krill and nls pellets.
6mm nls,10mm nls, kens krill 6mm
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