Hello! I'm a beginner to the whole Reptile/Amphibian pet keeping. I currently have my very first frog, the American Green Tree Frog. I keep him in a 18"x18"x18" Zoo Med Naturalistic Terrarium/Vivarium. I have two questions on this. First off is how many more frogs can I house in my terrarium? Because Julain (my frog) is alone he's rather shy. I know there's safety in numbers so maybe he'd be easier to handle around other frogs? My other question is that how can I keep my terrarium humid? The air has been very dry and not humid enough for my little kermit. I can't afford a fogger or heater yet and I keep two bowls of water in the terrarium. I mist it very often yet, it's still dry!