I bought the Tunze 9001 skimmer for my Biocube 32. It fits snugly into chamber 2. You might look at that one as a possible.I dont have the skimmer yet, still one of the purchases I'm waiting to bring into the build. On my 93 I'm dealing with having undetectable No3 and Po4. (Using Red Sea Pro kit and Hanna checker for No3, and just Hanna checker for Po4) With that being the case, and the overkill I went on the filtration for the larger build. I'm going to build up the filtration in the nano as the bio load grows. Starting out with just poly filter, and a media basket with ChemiPure Blue, and Marine Pure bio media. Adding in the skimmer and possible reactor once the bio load matures and has a higher demand.