Anyone have this type of filter?

I had a box filter when I first started out. It did it's job, and you didn't need an aeration stone because it bubbles but I prefer power filters.
 
Box filters have been around since Moby Dick was a minnow and they work just fine. They work on the same principle as a sponge filter but probably do a better job of mechanical filtration and not quite as good a job of biological filtration. IMO, they're most useful in smaller tanks (<10g) and quarantine tanks.
 

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