It's my tank.
Until your White-lipped TF's get a bit bigger keep them in a very simple tank or take them out to feed them. When they are full size they aren't that much larger than a GTF, probable a 1/4 bigger again at the most.
The tank was pretty easy to build.
This page has a great care sheet for tadpoles, White-lipped TF's and other frogs:
http://frogs.org.au/arc/caresheets.html
30 degrees for the water sounds a bit warm, and the larger the tadpoles the larger the morphs, larger morphs better survival rate.
