BSFL is a great staple feeder - since they are so small I am not sure how many to feed as a main diet- I fed them as a lure to the salad bowl when mine was little like 3 months old but I was and still am feeding dubia roaches - mine got tired of them and quit eating them around 6 months old - so I would maybe add some dubia roaches to his diet and silk worms too both are good staple feeders- my baby now almost a year this weekend is eating silks and dubias for a staple feeder- plus all the other worms like supers and horn and butter worms on top of the salads he gets every day -- if you need websites for dubias or silk worms I can post some for you-- some others on here can probably give you a better idea of how many he should be eating
Karrie