maybe this reply is a bit outdated, but.. i had 2 of those frogs i kept in my betta's 1/2 gallon tank, and i fed them sinking newt and aquatic frog food (jurassi-diet). I put them into the 18 gallon one, and every 2 days, dumped in a bunck of the pellets.. they sank, and my fish pretty much leave the pellets alone. they will find them eventually, and if they dont eat them all, my pleco and my snail will pick up the rest. they also seem to enjoy eating any food caught up in plants, or any fish flake food that has sunk to the bottom.
~TYPO
~TYPO