i owned leopard geckos and they said to buy crickets and keep them for a couple days but feed them lots of greens and sprinkle calcium (for the geckos) but oyu can find others for fish i bet, like when ppl make their own beefheart recipes they add things to fortify it. i used to get a dozen large crickets every week or every other week and feed them stuff called GUT LOAD for crickets for a couple days then toss them into the O. they love it. and it's good stuff too not just treats. yeah super worms are like large meal worms. meal worms work great also if that's all you can find i like to switch it up
all fish dont grow the same, but with you being mr know it all you know that.