The new tank is full and cycling now. I'm using a dirty filter from my fish tank to help cycle the new frog tank, and hope it works okay. I did a bunch of reading about fishless cycling online, but I might still put a guppy or two in there for a while, just to speed things up a bit.
The last tadpole is now starting to absorb its tail. The other two only have tiny black spots where their tails used to be. They are eating machines and will gobble up as much food as I put in there! I was worried about it a little bit when Buggy-Eyes was hogging all the food and Spotty wasn't getting as much, but I started breaking the pellets up into smaller pieces and not dropping them all in the same place. Now Spotty has a big fat belly, too!