Ive got a 75gal that im in the process of building for darts. I havent decided what will go in it but i was wondering. If i were to use hardwood to support the back wall, would it cause any problems with the frogs? it wont be exposed in any areas. So they wont be in direct contact with the wood but i have also taken into consideration the treatment of the wood or glue if there is any. I havent gotten it yet and will try to get it without any added chemicals, but id still like to be sure that this wont hurt them.