A good discussion of oxalic acid, its problems and recommended foods can be found here http://www.turtleforum.com/forum/upl...&#entry1048299. My disclaimer being I know high oxalic acid (as the only food supply) is a problem for things that actually consume plants. It may transfer from the crickets or simply reduce their intended calcium content, but I'm not a vet or a animal nutritionist so I can't say with any certainty. As for nori I don't know. The reason I made the recommendation I did, is that dark leafy veggies tend to have the best vitamin and mineral content, but if fed exclusively might have issues with calcium.