I've considered getting a fourth frog but it's just really hard to find a frog big enough to not get eaten by my current three! I've raised all these frogs from tiny froglets, that's all they appear to sell around here.
My other tank is a 20g but it has a school of cardinal tetras in it, so the temperature of that tank wouldn't work since I keep that tank at ~78F. I may need to get a 10g for a 'grow out' tank, I suppose.
This is my albino bought 5/18/12.. this is how they sell them -- tiny!