CO2

Carbon dioxide plays a major role in photosynthesis. CO2 can be added to your grow room with a tank and regulator or a generator. Generally atmospheric levels are high enough to support plant growth outside. The level of carbon dioxide indoors quite rapidly when plants are growing quickly. Replenish the levels as fast as possible with a Fuzzy Logic controller. Horizen Hydroponics sells, C.A.P. Controllers, Green Air Controllers, Harvest Master Controllers and IGS controllers, all of which have been carefully selected for their superior reliability! To learn more about CO2/Carbon Dioxide read our CO2 FAQ page.

Products

Sort by: Product Price Default
CAP 2 Timer CO2 Controller w/PPM - CO2-2e CAP 4 Timer CO2 Controller w/PPM CO2-4e CAP Atmosphere CO2 Day-Night Temperature Controller AIR-3DN
CAP 2 Timer CO2 Controller w/PPM - CO2-2e
CAP 4 Timer CO2 Controller w/PPM CO2-4e
CAP Atmosphere CO2 Day-Night Temperature Controller AIR-3DN
See details See details See details
Our price: $305.95
MRSP: $339.95

10% Savings

Our price: $377.95
MRSP: $419.95

10% Savings

Our price: $215.95
MRSP: $239.95

10% Savings

Quantity
Quantity
Quantity
CAP CO2 Generator Controller w/ PPM Sensor PPM-3 CAP CO2 PPM Monitor PPM-1C CAP Fuzzy Logic CO2 Controller PPM-2a
CAP CO2 Generator Controller w/ PPM Sensor PPM-3
CAP CO2 PPM Monitor PPM-1C
CAP Fuzzy Logic CO2 Controller PPM-2a
See details See details See details
Our price: $430.95
MRSP: $479.95

10% Savings

Our price: $440.95
MRSP: $489.95

10% Savings

Our price: $599.95
MRSP: $669.95

10% Savings

Quantity
Quantity
Quantity
CAP PPM-4 CO2 Monitor/Controller CAP Reg-1 CO2 Regulator CO2 Boost Kit
CAP PPM-4 CO2 Monitor/Controller
CAP Reg-1 CO2 Regulator
CO2 Boost Kit
See details See details See details
Our price: $242.95
MRSP: $269.95

10% Savings

Our price: $116.95
MRSP: $129.95

10% Savings

Our price: $120.95
MRSP: $135.00

10% Savings

Quantity
You can specify a number from 1 to 1000.
Quantity
Quantity
CO2 Boost Refill Bucket CO2 Test Kit CO2 Test Tube
CO2 Boost Refill Bucket
CO2 Test Kit
CO2 Test Tube
See details See details See details
Our price: $98.95
MRSP: $110.00

10% Savings

Our price: $15.95
MRSP: $17.95

11% Savings

Our price: $4.25
MRSP: $4.75

11% Savings

Quantity
Quantity
Quantity
Green Air Atmospheric Control with Photo Sensor Green Air Atmospheric Controller CT-DH-3 Green Air Carbon Dioxide Digital Sequencer
Green Air Atmospheric Control with Photo Sensor
Green Air Atmospheric Controller CT-DH-3
Green Air Carbon Dioxide Digital Sequencer
See details See details See details
Our price: $269.95
MRSP: $300.00

10% Savings

Our price: $215.95
MRSP: $240.00

10% Savings

Our price: $449.95
MRSP: $500.00

10% Savings

Quantity
Quantity
Quantity
Green Air Carbon Dioxide Monitor And Control - CDMC-6 Green Air CO2 Generator CD-12LP Propane Green Air CO2 Generator CD-12NG Natural Gas
Green Air Carbon Dioxide Monitor And Control - CDMC-6
Green Air CO2 Generator CD-12LP Propane
Green Air CO2 Generator CD-12NG Natural Gas
See details See details See details
Our price: $879.95
MRSP: $990.00

11% Savings

Our price: $584.95
MRSP: $650.00

10% Savings

Our price: $629.95
MRSP: $700.00

10% Savings

Quantity
Quantity
Quantity
Green Air CO2 Generator CD-18LP Propane Green Air CO2 Generator CD-18NG Natural Gas Green Air CO2 Generator CD-36LP Propane
Green Air CO2 Generator CD-18LP Propane
Green Air CO2 Generator CD-18NG Natural Gas
Green Air CO2 Generator CD-36LP Propane
See details See details See details
Our price: $609.95
MRSP: $680.00

10% Savings

Our price: $638.95
MRSP: $710.00

10% Savings

Our price: $759.95
MRSP: $845.00

10% Savings

Quantity
Quantity
Quantity
Green Air CO2 Generator CD-36NG Natural Gas Green Air CO2 Generator CD-3LP Propane Green Air CO2 Generator CD-3NG Natural Gas
Green Air CO2 Generator CD-36NG Natural Gas
Green Air CO2 Generator CD-3LP Propane
Green Air CO2 Generator CD-3NG Natural Gas
See details See details See details
Our price: $777.95
MRSP: $865.00

10% Savings

Our price: $458.95
MRSP: $510.00

10% Savings

Our price: $489.95
MRSP: $545.00

10% Savings

Quantity
Quantity
Quantity
Green Air CO2 Generator CD-6LP Propane Green Air CO2 Generator CD-6NG Natural Gas Green Air CO2 Set Point Controller SPC-1
Green Air CO2 Generator CD-6LP Propane
Green Air CO2 Generator CD-6NG Natural Gas
Green Air CO2 Set Point Controller SPC-1
See details See details See details
Our price: $539.95
MRSP: $600.00

10% Savings

Our price: $557.95
MRSP: $620.00

10% Savings

Our price: $597.95
MRSP: $665.00

10% Savings

Quantity
Quantity
Quantity
Green Air CO2 Wall Mount Monitor CDM-6000 HydroFarm CO2 Injection kit .2-2 CFM HydroFarm CO2 Injection Kit 2-20 CFM
Green Air CO2 Wall Mount Monitor CDM-6000
HydroFarm CO2 Injection kit .2-2 CFM
HydroFarm CO2 Injection Kit 2-20 CFM
See details See details See details
Our price: $439.95
MRSP: $490.00

10% Savings

Our price: $125.95
MRSP: $139.95

10% Savings

Our price: $129.95
MRSP: $144.95

10% Savings

Quantity
Quantity
Quantity
HydroGen CO2 Monitor HydroGen PRO CO2 Generator HydroGen Water Flow Valve
HydroGen CO2 Monitor
HydroGen PRO CO2 Generator
HydroGen Water Flow Valve
See details See details See details
Our price: $315.00
MRSP: $350.00

10% Savings

Our price: $360.00
MRSP: $400.00

10% Savings

Our price: $67.50
MRSP: $75.00

10% Savings

Quantity
You can specify a number from 1 to 1000.
Quantity
You can specify a number from 1 to 1000.
Quantity
You can specify a number from 1 to 1000.
iGS CO2 Control w High Temp Shut Off Function iGS-061 iGS CO2 Control w/Auxiliary Shut Off Output iGS-100 iGS Day & Night CO2, Rel Hum & Temp Smart Control iGS-220
iGS CO2 Control w High Temp Shut Off Function iGS-061
iGS CO2 Control w/Auxiliary Shut Off Output iGS-100
iGS Day & Night CO2, Rel Hum & Temp Smart Control iGS-220
See details See details See details
Our price: $574.95
MRSP: $639.00

10% Savings

Our price: $691.95
MRSP: $769.00

10% Savings

Our price: $898.95
MRSP: $999.00

10% Savings

Quantity
Quantity
Quantity
Sentinel / GPS C02 Regulator Sentinel / GPS CO2 & PPM Controller - CPPM-1 Sentinel / GPS CO2 Generator Extension Hose 12'
Sentinel / GPS C02 Regulator
Sentinel / GPS CO2 & PPM Controller - CPPM-1
Sentinel / GPS CO2 Generator Extension Hose 12'
See details See details See details
Our price: $134.95
MRSP: $149.95

10% Savings

Our price: $539.95
MRSP: $600.00

10% Savings

Our price: $37.75
MRSP: $42.00

10% Savings

Quantity
You can specify a number from 1 to 1000.
Quantity
You can specify a number from 1 to 1000.
Quantity
You can specify a number from 1 to 1000.
Sentinel / GPS CO2 Generator Extension Hose 20' Sentinel / GPS CO2 Generator LP 3000-6000 BTU - VCG-6 LP Sentinel / GPS CO2 Generator NG 3000-6000 BTU - VCG-6 NG
Sentinel / GPS CO2 Generator Extension Hose 20'
Sentinel / GPS CO2 Generator LP 3000-6000 BTU - VCG-6 LP
Sentinel / GPS CO2 Generator NG 3000-6000 BTU - VCG-6 NG
See details See details See details
Our price: $53.95
MRSP: $60.00

10% Savings

Our price: $439.95
MRSP: $489.95

10% Savings

Our price: $440.95
MRSP: $489.95

10% Savings

Quantity
You can specify a number from 1 to 1000.
Quantity
You can specify a number from 1 to 1000.
Quantity
You can specify a number from 1 to 1000.
Sentinel / GPS Co2 Generator, LP: 6000-27000 Btu - High Altitude Sentinel / GPS Co2 Generator, LP: 6000-27000 Btu - VCG-27 LP Sentinel / GPS Co2 Generator, NG: 3000-6000 Btu - High Altitude
Sentinel / GPS Co2 Generator, LP: 6000-27000 Btu - High Altitude
Sentinel / GPS Co2 Generator, LP: 6000-27000 Btu - VCG-27 LP
Sentinel / GPS Co2 Generator, NG: 3000-6000 Btu - High Altitude
See details See details See details
Our price: $611.95
MRSP: $679.95

10% Savings

Our price: $611.95
MRSP: $679.95

10% Savings

Our price: $439.95
MRSP: $489.89

10% Savings

Quantity
You can specify a number from 1 to 1000.
Quantity
You can specify a number from 1 to 1000.
Quantity
You can specify a number from 1 to 1000.
Sentinel / GPS Co2 Generator, NG: 6000-27000 Btu - High Altitude Sentinel / GPS Co2 Generator, NG: 6000-27000 Btu - VCG-27 NG Sentinel / GPS Expansion CO2 Regulator
Sentinel / GPS Co2 Generator, NG: 6000-27000 Btu - High Altitude
Sentinel / GPS Co2 Generator, NG: 6000-27000 Btu - VCG-27 NG
Sentinel / GPS Expansion CO2 Regulator
See details See details See details
Our price: $611.95
MRSP: $679.95

10% Savings

Our price: $611.95
MRSP: $679.95

10% Savings

Our price: $71.95
MRSP: $79.95

10% Savings

Quantity
You can specify a number from 1 to 1000.
Quantity
You can specify a number from 1 to 1000.
Quantity
You can specify a number from 1 to 1000.