All the time I have been trying to find a simple and almost self-serving system. The one that I have established recently satisfies me. In the main tank there is about 80 kg of live rocks, the other part of the filtration system being the skimmer and the reactor with NP reducing BioPellets in the sump. There is also a Korallenzucht Magnetic Zeovit Reactor S, which I had used for the Zeovit method, but after some adaptation, I started to use as a reactor for the polymers. The water flow through the biopellets is adjusted to about 1200 l/h. As an element of chemical filtration I also placed a bag with activated carbon, which is exchanged monthly. Sometimes filter floss is used as well. That is what my filtration system is all about. As for NP reducing BioPellets, which are relatively new, I am nicely surprised that they work the way as it was promised by their inventor. Might it be a breakthrough in reefkeeping?