What is a good external filter?

[supersmile]

I have been getting some cyano algae and someone mentioned I may not have a good filter system. I am running a Resun AE-806 in a 44 gallon tank with a coralife skimmer. Is there a filter system someone really recommends?

[dsaundry]

fluval or rena both good:biggrin:

[Drock169]

I prefer Rena