I can't say what brand would be best nor what style would be best. You could get a biowheel filter (I have no experience with these) or you could get a HOB filter which are fairly common. I would suggest getting two filters rated each rated for about a 50 gallon tank (if you can't find one for a 50 gallon, it's always better to get one rated for a slightly bigger tank rather than a smaller one)
the reason its good to get the two filters is it helps spread out the power of the filter. Sorry I can't be much more help than that
forum community dedicated to tropical fish owners and enthusiasts. Come join the discussion about species,breeding, health, behavior, aquariums, adopting, care, classifieds, and more! Open to fish, plants and reptiles living in freshwater or saltwater environments.