cool! Welcome to the forum. I love the frog soaking in a frog idea. Very whimsical!! Well if it's a tree frog it would like a taller tank. I would look up those plants and make sure they're not toxic in any way. You need hydrometer-- absolutly, plus atleast obe thermometer. And see if the soil needs to be changed. Potting soil may make him sick beacause of the fertilizers they add in it. If u think it's sick or stressed some spring water with drop of honey should perk him up a bit. I too had everything before I got frogs, as this is a totally new level in animal care. They have to be way more sterile than any other animal, but it also requires more mental attention than anything I've had. but somehow it's more rewarding, as you'll soon find out. Welcome to our forum, care sheets to the left, internal search tree frog viv pictures and you'll be swamped with ideas!!