This is an Aquamaxx NF-1 nano protein skimmer. I purchased it on MarineDepot about a month ago for my Innovative Marine Nuvo Fusion 10 gallon aquarium (see "will it fit" video on MarineDepot's website). I will ship anywhere in the US for $90. When I got it, I started breaking it in by placing it into a bucket of water from a water change. It was pulling nice tea-colored skimmate after a couple days and seemed to work very well, much better than my IM Ghost skimmer, and quieter. Unfortunately, today when I went to install it in my tank, the fit was just too tight. I could feel that it would fit in the second chamber, but the fit was definitely tight and I didn't want to risk it blocking any flow through the rear chamber. So... I ran it in some vinegar solution for a couple hours, then cleaned everything and am boxing it back up. It's in nearly-new condition. If you have a nano tank that has a slight larger skimmer compartment, or a sump, or you want to put this directly in the tank, it could be a great option. The only adjustment is changing the height of the skimmer in the water, which affects how wet/dry the skim is, and is super easy using the magnet mount.