Advanced Nutrients Tarantula® 1LTARANTULA Put Beneficial Microbes To Work In Your Root Zone It's a known fact that beneficial microbes in your plants' root zone assist in the processes that give your plants the vital nutrients they need. Put Tarantula's beneficial microbes to work in your hydroponics root zone today. Tarantula is specially designed for use with all hydroponic growing media including coco coir as well as continuous liquid feed growing systems such as aeroponics drip