Does anyone know where I can get a tank divider for a 60 gallon tank? It is pretty tall and I have had trouble finding a tank divider that will fit from my LFS, petsmart and petco. Here are the measurements - 48-1/4"L x 12-3/4"W x 57-3/4"H. I was also looking into making one out of plexiglass and drilling holes in it for water circulation. Would this work or is plexiglass toxic to the water? If so, is there another material I can use? Thanks!