Bionova Zym Enzymes and Stimulator - 1L - Case of 12Bionova Zym (aka BN Zym) increases bacteria activity, helping convert nutrients and minerals in your substrate into material that can be directly uptaken by the roots. BN Zym catalyzes waste matter and delivers it back to the crop in the form of plant available nutrients. Moreover, the medium stays clean and free of excess components. This is important for every cultivation; especially for those that re use soil and coco substrates. WHY USE BN ZYM?