Mechanical Filtration ?

[BCOrchidGuy]

If you want an HOB filter, I would suggest you consider is the Magnum 350 by Marineland. There are two versions I believe, one is an HOB the other sits on the floor with hoses to and from the aquarium. The reason I like this filter is that you can run it as an external filter and then use it as a diatom filter and polish your water once in a while. Just clean it well afterwards and use it again as your external filter.

Doug