Im in the same boat as you. Get some acrylic dividers and 100% silicone to hold them in place. Next depends on your tank, if it is not pre-drilled or you can drill it because it has stuff in it already, you will need an overflow box (I would suggest lifereef). You will also need a pump to return the water back from the fuge to your display, and the power of the pump will be determined by how far up the water has to be pumped. Do a search for fuges and you will find tons of info. HTH