I've had them, 2 of mine lived to be 5 and I got them at a Genovese.
The smaller tanks arent so good mainly because these little guys zip around the tank and bump into things alot. 5 gallons could hold 2 nicely by themselves with no other animals in the tank, 10 gallons probably 4 frogs since they dont get that big and offcourse shouldnt have to exhaust themselves to reach the surface to breath, they are little!
And yes, I have seen them somehow scale the sides of the tank and try to climb out, and out of water they can hop! But they will die once they dry out, so have a good cover!
A calm flowing filter is good because they do make a mess searching for food turning up rocks and small plants. They will spend hours searching for food,and when you do put food in be prepared for alot of excitement. They like to hunt in the dark rather than light,and there great sense of smell allows them to do this.
They like to hide in caves most of the time, so do provide a hiding space, and dont have sharp objects, there skin easily damages and then you have to worry about infection. If you can do without gravel that will make it easier for them
to find the food.
I personally didnt have any other animal with them. Fish too small would be eaten, but fish too big will injure or even kill the frogs. And the difference between them and there larger cousin the african clawed frog is these guys stay small, and the african clawed frogs will eat them, so dont mix them under any circumstances!
I fed mine mostly live food. Live blackworms,tubifex worms, small brine shrimp. They also eat frozen bloodworms and sinking tadpole pellets. But the pellets should not be the only thing in there diet, they need variety.
They also will over-eat, so there feeding schedule needs to be monitered. They are also succeptable to Bloat disease, where they balloon up and float to the surface and cant swim.
If you have a mature male, they will call to females by making a loud humming sound. It's really bizarre sounding!
Here are the pellets to look for, since these are the only ones that will fit in there mouth! There called Frog & Tadpole bites.
And heres how to tell african clawed from african dwarf.
Dwarf (eyes on side of head)
Clawed (eyes on top of head, when they are small they can easily be confused with there dwarf cousins)
Good site on there care.http://davidcecere.pipidae.org/