Just a quick update:

Most of the tadpoles have little legs now! Their legs have been developing for about a week but I wasn't sure if they were just strings of poo until the legs got a bit bigger and I noticed their little feet!
Most of the tadpoles are growing quickly. One of them is tiny though. She's the same size as the others were when they were two days old but she's over 2 weeks old now (from hatching)! She rests on the bottom a lot and every day I expect her to be dead but somehow she's still alive! I don't think she's going to make it to the froglet stage but I hope she surprises me. I still have 80 tadpoles in total. I can't wait for their arms to grow :D