I would say that this is my personal pk 13,14 favorite
I use it since years , and its always make's a huge difrence in the buds - belive me iv test it with and without at least few times !
Power Zyme is a real find. How did I ever manage hydroponics without it? The solution stays clean even at temperatures above +25°C. I can run DWC in the summer heat—even at +30°C—without a chiller. Thanks to Hesi for an excellent hydroponics kit!