I can tell you what I did, I bought a cheap 29 Gal tank and had some glass pieces cut and drilled at the glass place, then just siliconed the glass where I wanted it. If I had it to do over I would have changed some stuff around, but it works for me. I didn't spend much money, if you figure what some of these places want for sumps. As far as this skimmer, you also have to take the pump into consideration, as it's gonna take up some room too. But your most likely gonna have that problem with any skimmer. How big is your sump?