does it hang off the back? if so i would put it in there, turing it into a HOB fuge.
If you dont convert it to a fuge, then i would get rid of the power filter. Unless you are cleaning them every 3 or 4 days, they will cause more problems then they solve. The particles that the filter media traps stay in the water flow, so when the decompose into smaller compounds, those are release from the filter media back into the water to feed cyano or algae.