I agree the more bio-breakdown between water changes the better. As I said my aim is have at least 10 x of the tank volume of filtered each hour.
I have just started using Hydroton thanks to Anthony's suggestion, I think it's a great product and very economical too. In particular the type I purchased @ Jon's Plant Factory in Burnaby is small and spherical which means lots of surface area. I started using much more expensive Biohome Ultra 2 months ago after some research and when I found AngelFins was importing it. It's another media that works on 3 forms of ammonia and I like the results from it as well.
Hydroton is clay based, Biohome is cinder glass. Hydroton floats, Biohome does not. I am mixing them both in all my canister and HOB filters. I also use open cell sponges to capture detritus and breakdown bio-solids before flowing through the media to make it as efficient as possible.
Thanks for the original post to this thread, it's great information for everyone.