Quote:
Originally Posted by
dick benbow 
Many moons ago when I started using j-mat I had the same problem. I wrote my buddies in the UK who sent pictures of what they were doing....vortexes,up flow, and air stones well below the media so that the entire filter surface looked like a jacuzzi. Not a spec of dirt...not only was the air making an aroebic condition, it wouldn't allow detrius to settle anywhere. So I went and copied their treatment of j-mat and i have not cleaned or had to for the last few years.