I have a seaclone 150 and I spent WAY too much time and money to get it to working good enough for a nano tank. Spend a little more and get something good. Most skimmers will have at least one bad review, but I've never seen a good review for seaclones (at least from a reputable source). I mean, I'm sure many people are sold seaclones by their lfs and were told that they were good.
Octopus Hang On The Back Protein Skimmer BH-300 by Vue Technology has dual reactor chambers with 2 x Resun King xternal needlewheel pump (included), rated up to 135 gallons. This Octopus BH-300 Protein Skimmer has been compered to the CPR bakpak shimmer on steroids.
I don't endorse this product nor do I have any experience with it, but it does come from a well known and reputable company, so it may be worth looking into. It is rated for 135 gallons and it is priced at 130 bucks.