Hi i have a pair of t cup stingrays which had two pups . I have been told they are difficult to get feeding .I have offered them live whiteworm ,frozen bloodworm and chopped earthworms. any excess food is removed and a water change done.PH 6.7 . They are kept in the same tank as the parent fish in a partitioned off section.They are keptunder subdued lighting which seems to promote more activity,and at night with a nightligth in the room they are very active .I put fresh food in at night so they come across it trying to promote a responce ,excess removed.Ihave been trying to get other breeders comments regarding this situation.The parents mated instantley once the pups had been born.The tank has a sand substrat and generous filtration.Thanks PED pS the pups look perfect.