Plum, to answer your question, Yes.
I am still feeding them this pellet mixture without any side effects noted. The females are especially ravenous during their pregnancies and consume close to 2.75 tablespoons/ray/day. They are vibrant and have grown considerably. I do still supplement their diets with market shrimp (raw) and nightcrawlers (after a good rain). These supplements are the exception and infrequent. I will post some photos ASAP.
One note:
The latest spine shed by my largest ray was EXCEPTIONAL compared to her previous shed. The girth, length, width and stiffness of the latest shed is astonishing. The previous spine was more like a toothpick, the latest is more like a framing nail.
Respectfully,
FireMedic.