I can't speak for the Nano, but I put a Mag 5 pump on my Remora and it works great. I have to keep the collection cup at its highest level but the quality and quantity of skimmate blew me away.
Another thing you can try to improve performance is to use a surface skimmer like this one here
http://www.jlaquatics.com/phpstore/s...t_ID=hg-fzskim
If the nano can handle the increased flow and you hooked up one of these to a MJ 1200 you might get some really good results.
HTH