BioNova BN-Zym 5 LitreBioNova BN Zym BN Zym is a natural bio catalyst (process accelerator), medium builder and medium improver based on specific enzymes. Enzymes stimulate the water retaining ability of every medium and decrease the soil tension of water, which enables a quicker and better penetration of water into the medium. While BN Zym penetrates into the medium, it also brings more oxygen into it! Enzymes are specialized protein molecules and work as catalysts in