I've had good luck with most aquatic phase newts taking this sort of meat-based gelatin diet. This includes various Triturus and Cynops orientalis. After all, frozen bloodworms don't move, and they take them. Proves that smell is possibly the most important hunting sense for aquatic newts. Same is not true for terrestrial animals of the same species - there, motion appears to be essential. They will (usually) take the same gelatin-based mix if fed with forceps.