Bloodworm, whether live, frozen or dried, should only be fed once a week as a treat, the same as for most community fish. Many people say to feed them only blood worm, but they really need a prepared specialist frog food such as HBH frog and tadpole food (in the USA) or ZooMed frog food (UK). There may well be other makes too. These provide them with all the nutrition they need, bloodworm alone can't provide everything. I'm in the UK and couldn't find the ZooMed food in any shops so I had to buy it on-line.