Hi...am setting up a new discus tank 120x60x75. The tank has a blue base that looks like a swimming pool. Have bought a perspex mirror sheet that im going to put on the base, running a bead of silicone around the edge. Im sure that my discus like the mirror effect with the base of the tank that theyre in now, and am hoping that the mirror will fool them into thinking that the shoal is bigger. have seen articles about mirrored sides/back, but not base. Any thoughts? Thanks, Benj.