Filter by Default sorting Sort by popularity Sort by average rating Sort by latest Sort by price: low to high Sort by price: high to low View: 12 24 All Climate Control / CO2, pH/EC MaintenanceActive Air 3-Way Meter $9.99 Add to cart Climate Control / CO2Active Air AC, 14,000 BTU $534.99 Add to cart Climate Control / CO2Active Air Hydro-Therm. w/alarm $21.99 Add to cart Climate Control / CO2, Garden AccessoriesActive Air Hygro-Ther. Min/Max $25.99 Add to cart Climate Control / CO2Active Air Premium Ducting, 10″ $33.99 Add to cart Climate Control / CO2Active Air Premium Ducting, 4″ $15.99 Add to cart Climate Control / CO2Active Air Premium Ducting, 6″ $21.99 Add to cart Climate Control / CO2Active Air Premium Ducting, 8″ $28.99 Add to cart Climate Control / CO2Active Air Speed Adjuster, 5A $20.99 Add to cart Climate Control / CO2Air 3, Atmos./CO2/Temp/Humidity $99.99 Add to cart Climate Control / CO2Atmosphere Backdraft Damper, 4″ $22.99 Add to cart Climate Control / CO2Autopilot 4-Light HID Control $109.99 Add to cart 1 2 3 4 5 6 7