There's another guy on youtube that describes anoxic filtration. Check out Jay's Aquarium. He has a four part series on it. He has a turtle tank he has not done any water changes to in two years. The high water quality and low maintenance combination is what has me most interested in this. I will be setting up a large tank in the near future that will be my first tank ever with a sump. I'm gonna give this a shot.
Bump: The litter/laterite never need to be recharged. He has baskets that have been filtering his koi ponds for years. His dosing is only for his plants.