I made a new home for my Hyla versicolor and my Hyla cinerea useing a 20 gallon long. Put them all in there and wow are they happy. I put plants , logs , I made a log to go straight across the tank about midddle hight and they love it theres a frog on every purch and in the plants. I think 7 treefrogs in a 20 g long is to many. But I am getting more tanks soon I have an idea for a great treefrog teraium. 2 20 gallon longs on top of each other clamped with screen clamps. Remove the bottom glass from one. Put a screen top on it. You can break it in half to clean. 2 10s would work or 2 anything realy. Put one upside down on top of the other. Remove the bottom glass of the top one and valah.