I've never explored the possibilities of the grindal worms much, as they are usually raised for live fish food. However, I do think an experiment in placing them in a vivarium is worth consideration. They are an annelid, somewhat like a small white version of an earth worm, and I should think the the smaller ones would also provide an occasional treat for dart frogs as well as aerating the soil and adding to the overall balance of a vivarium. They wouldn't be a staple food because we need to provide D3 vitamin in particular as a dust, because most dart frog tanks do not utilize internal UV lighting to provide this. I do think that some people are using them in dart tanks, but I haven't really read a lot about this yet. I think they are definitely worth a trial. Even if one just obtains a few of them to feed the frogs, some are going to escape into the substrate and either colonize or not. I can't think of any real danger in trying this.
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Patty
Pahsimeroi, Idaho

Dendrobates: auratus blue, auratus Ancon Hill, tinctorius azureus, leucomelas. Phyllobates: vittatus, terribilis, lugubris. Epipedobates: anthonyi tricolor pasaje. Ranitomeya fantastica, imitator, reticulata. Adelphobates castaneoticus, galactonotus. Oophagia pumilio Bastimentos. (updated systematic nomenclature)

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