Well we'll just have to disagree Rex. All I can say is I've been using it for 2 years now and it's not clogged yet. However I do run the water through my clarifier before it gets to the biofilter. All the literature says you want the water to be as clean as possible before it hits your biofilter, even sand filters.

Did you run the water through a filter first? If so what kind of filter?

If pigs could fly bacon would be harder to come by and there would be a lot of damaged trees.