I would say yes it should be enough filtration... But it also depends on what fish you plan on keeping in there and how many. Maybe you could hook that power head up to a UGF or add an Ac110, I personally like to run 2 filters on all my tanks.
This is going to be temporary. I plan on adding an Eheim 2217 later down the road to run my UV through. Fish: spotted/tropical gar, tigrinus/juruense, motoro, p.e.endlicheri. Then maybe a few small fish to keep some activitiy in the tank.