Anybody who knows me knows that I always want to get the biggest tank possible for all my frogs....but bigger is not always better. I had a Banana reed frog in a ten gallon and he did great. After six months I moved him to a 18x18x24 Exo. He didn't do well in that tank. He had trouble finding food, got skinny so I moved him back. Then he did well again. So there are exceptions to every rule.