I got 2 African Dwarf frogs from petco today, in a 2 gallon tank, and I'm having feeding issues. I bought what the petstore person recommended, Zoo Med Aquatic Frog and Tadpole food pellets. I dropped a few pellets close to the frog where they could see it, and they tried to swallow it, but spit it back about after a few seconds.... I cant get them to keep the pellets down! I'm not sure what to do, and I'm very worried. Also, I do not have gravel in the tank, and I have a few plants for hiding. I'm not sure what I'm doing wrong. Can someone please help me?