Hydrologic Big Boy Carbon Filter beneficial microbes S1 is designed for application

S1 is designed for application exclusively in flowering phase

and 55 earth-friendly Quick Start plugs to get your plants off to a great start

Highly reflective aluminum

906716 or 906717 for communication with the EL controller

Fits 8" ducting

Hydrologic Big Boy Carbon Filter beneficial microbes S1 is designed for applicationKeep your water fresh, your equipment in tip top shape, and your grow room at its best by making the commitment to exchange your filters. This carbon filter works with the Big Boy water filtration system and slips in easily to replace the one that came with your unit or additional replacements along the way.