Mykos Bar Root Paks are great for hydroponic systems, such as deep water culture, aero and aquaponics. They grow big roots and keep the Mykos where they need to be and not clogging up your system and sprayers. Mykos works faster and inoculates stronger. May be used with any nutrient line. Easy-to-use bar pouch resembles the look of a candy bar. A great point of purchase display. Attractive display box contains 60 x 100 gram pouches.