New member- Albino Gray Tree Frog Questions

[LindseyFrog]

Last spring, here in Kentucky, I found tadpoles that appeared to be albino. They morphed in June and I believe they are albino gray tree frogs (feel free to correct me if I'm wrong). Has anyone seen anything like this and is it common to find albino frogs in the wild? I have been primarily feeding them fruit flies, and I occasionally special order pinhead crickets for them. They are still tiny. Is there anything else they can or should be eating?
I haven't had a terrarium since I was a kid, so I'm kind of winging it. They are in a 5 gallon tank with live plants and I change their water every couple of days. I have 2 of them (Walter White and Jesse Pinkman) and they're about 3/4 inch in size. How much longer can I get away with a 5 gallon tank an at what age are they full grown? I suppose they're too young to guess their sex. I'd appreciate any advice. I've become pretty attached to these little guys and want to make sure I'm taking good care of them!