Here's some snapshots of my 40B with Clawed Frogs.. I know it's not an aquascaping masterpiece by any stretch but the frogs really enjoy it!
This is a 40 gallon breeder tank (which is actually 45 gallons). As you can see these guys love to swim around, get the biggest aquarium you can, trust me.
These are only 2.5 to 3.5" frogs btw.. they're still juveniles.. about 5-7 months old.