Well im in the process on setting up a new rack and at first I was going to do exo terra tanks for the whole thing. But I can only fit 3 on each shelf. But if I do standard size tank with making my own fronts or lids I can do more tanks. So the question is for the people out there that have racks of normal tanks and made their own lids or fronts do you like them or would you of gone to exos or zoomeds if you could do them over. Also does everyone like front opening or top opening tanks, and im still up in the air on drilling them all with bulk heads not sure yet but they will all have false floors.