Hey, I own a red spotted newt eft. He feeds on first instar mealworms and such, which is nice to control my t.molitor culture. I was cleaning tanks today, and I found a huge colony of grain mites feeding on a dead cricket in a beetle cage. I was wondering if you could use mites to feed any species of small invertebrate or amphibian? It would be less costly, since grain mites appear out of nowhere and are unwanted. Do they carry any toxins or anything that would kill amphibians?