Are you going to keep any fish in it? I would do a softy tank with it. It is easier to screw up the water quality with overfeeding etc because of less volume. Just keep an eye on water parameters, maybe go digital, like with the probes and digital display for temp, ph, calcium, whatever. I think it would be hard to keep even one fish without getting some nitrate, even when skimmimg 24/7. Sounds fun though. I have a 75 gallon reef, downgraded from a 200 gallon.