Get the 9010, the 9005 does not include the pipe/sump system, by the time you buy a 9005 and the 9005.400 extension set, it is only $30 less than a 9010. The 9005 is really made for in tank use with a canopy, that is its niche. The 9010 needs a 5 by 7 area, same as the 9005 with sump kit. You might also take a look at the 9410, it is the same height as a 9010 but uses a needlewheel pump, it is stronger, it does have a bigger footprint. (10 by 7 roughly)