Don't bother. Nano skimmers are garbage and you don't need one. As long as you have live rock, and you do weekly PWC's, you've got all the filtration necessary. I would save the money for something else that you might really need like fish food, coral, fish, etc... Don't waste it on nano skimmers, because they hardly compare to regular protein skimmers that actually have a purpose on tanks larger than 50 gallons.