Quote Originally Posted by Kurt View Post
With aquatic frogs like African clawed frogs, dwarf clawed frogs, and Suriname toads gravel is fine. These are the only frogs one can keep with gravel as a substrate. Anything that is terreatrial, arboreal or semi-aquatic and eats live prey such as insects should never have gravel as a substrate. The risk of impaction is just to great, but in the aquatic enviroment gravel will not stick to food and thus will not be swallowed accidently.
Sorry, Kurt, but I have to disagree on this, speaking from personal experience. My female African clawed frog did choke on aquarium gravel during feeding. She was so excited and just started shoveling it in with her front legs. I had to fish her out and remove the gravel from her throat with blunted tweezers. She survived, but the gravel was tossed. I would be very leery of using such gravel with these guys, but I have had no problems with it and Dwarf frogs.