I need some help finding some info. I am building a refugium out of a Tetra 29G tank and want to drill a hole in it but do not know if the tank is tempered. I have searched the web including the Tetra website and cannot find any info on the tank. Does anyone know if this tank is tempered or at least where I could find info on it? I want to use an external pump for return because that is what I have. If it is tempered, would it work if I piped up over the side of the tank into the water? Thanks for the help!!