I used 1 cup the same size for water too. No noticeable standing water but if you squeeze the mixture it has water drop from it. Basically it was 1:1:1. I use 8 pokes in each deli cup. Condensation is visible on all sides and the top. My room temps are 80-82 and they are on my QT rack spare chunk of heat tape for now. I've heard that 90's will make them eat more and grow faster because their metabolism is higher. The two smaller ones are eating microcrickets and the 1" Seemani is eating small crickets in succession. If your Versicolor is 1" you might need some small crickets! I'm not sure how big those FFF are but if I remember correctly from when I used to raise tree frogs they are pretty tiny.
Regards,
B