I concur with Shawn's statements vis-a-vis breeding with a few additional comments. I let the male transport the tads to water now and I have a small custard dish nestled into a coconut dish that I can easily remove for tadpole access.
I tend to raise them now 2-3 per 16 oz solo cup. Diet includes frog bites and spirulina/chlorella. Once they show signs of elbows, I am currently morphing them out as shown below. The water level is reduced in the 15 oz. cup to about 1/2 to 3/4 inch depth and long fiber sphagnum added. They easily climb out when ready and I rarely see drowning.
I've used the slanted shoebox approach as well for mass morphing but find that some of the froglets will wander back into the water and drown. I have no idea why that is the case.