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CO2 Systems

Plants use the carbon dioxide (CO2) that occurs naturally in our atmosphere, along with sunlight, to make the energy it takes for growth. Plants will exhaust the level of atmospheric CO2 — 300 parts per million (ppm) — as they grow in enclosed spaces (when CO2 levels fall to 200 ppm, plant growth ceases). Increasing the level of carbon dioxide in your grow room can increase growth and flowering — up to 30% and more — if all other factors — water, light, nutrients — are optimum. Read More

Over years of testing, it's been found that the best levels of CO2 for plant growth are around 1500 ppm. Make sure your plants never exhaust their supply of carbon dioxide and grow fast and strong under optimum levels with these easy to use CO2 systems. All the necessary implements — controllers, regulators, converters, piping and monitors — are here, too.

  • CO2 Bag

    CO2 Bags

    Supplies up to 1500 ppm CO2, depending upon room size and ventilation …

    $29.95 $22.95
  • Analog CO2 Controller

    Analog CO2 Controller

    Monitor and control CO2 levels with this simple and affordable analog device.

    $308.95 $277.95
  • C.A.P

    C.A.P. CO2 Generator (GEN-1)

    Operates up to 100° F cooler than other brands! The C.A.P. GEN-1 CO2 Generator is constructed with a powder coated ...

    $404.95 $317.00
  • C.A.P

    C.A.P. CO2 Generator (GEN-2)

    Provides years of trouble-free operation! C.A.P. CO2 generators are constructed with powder coated steel enclosures that resist moisture, rust and ...

    $569.50 $446.95
  • CO2 & Atmospheric Controller (AIR-3) 1

    CO2 & Atmospheric Controller (AIR-3)

    The C.A.P. AIR-3 expands our line of atmospheric controllers by providing the ability to coordinate supplemental CO2 with your ventilation ...

    $224.95 $177.95
  • CO2 & Environmental Controller (CO2-2e) 1

    CO2 & Environmental (CO2-2e)

    The CO2-2e has two timers that are used to add just the right amount of

    $294.95 $233.95
  • CO2 & Environmental Controller (CO2-4e) 1

    CO2 & Environmental Controller (CO2-4e)

    Use to control the temperature, humidity and CO2 levels within your growing …

    $349.95 $277.95
  • CO2 & Temperature Controller (AIR-3DN) 1

    CO2 & Temperature (AIR-3DN)

    Provides the ability to coordinate supplemental CO2 with your ventilation equipment.

    $234.95 $186.95
  • CO2 Boost 1

    CO2 Boost

    Uses gas created from mushroom and compost production to provide a steady …

    $135.00 $114.95
  • CO2 PPM Controller (CPPM-4) 1

    CO2 Controller (CPPM-4)

    Uses a CO2 sensor that is extremely accurate and features a 10-year life …

  • Fuzzy Logic CO2 Controller (PPM-2a) 1

    CO2 Controller (PPM-2a)

    What sets this CO2 Controller apart from the competition? Fuzzy logic!

    $599.95 $473.00
  • CO2 Controller

    CO2 Controller w/ Fuzzy Logic

    This controller automatically keeps CO2 PPM amounts perfectly balanced …

    $534.95 $481.50
  • Universal CO2 Monitor 1

    CO2 Monitor

    Ships preset to turn on at 1300 PPM and off at 1500 PPM with overshoot …

    $359.95 $344.95
  • CO2 Monitor (PPM-1c) 1

    CO2 Monitor (PPM-1c)

    Measures the exact level of CO2 in your growing area and displays this value …

    $479.95 $394.95
  • CO2 Monitor & Controller (PPM-3) 1

    CO2 Monitor & Controller (PPM-3)

    Just plug your CO2 device (valve or generator) into the “piggyback” cord and it …

    $479.95 $395.00
  • CO2 Monitor & Controller (PPM-4) 1

    CO2 Monitor & Controller (PPM-4)

    The simplicity of this unit will make it attractive to both the hobbyist and the …

    $274.95 $219.50
  • CO2 Regulator (CO2-REG) 1

    CO2 Regulator (CO2-REG)

    Regulates the amount of CO2 with a precision flow gauge  that can be set from …

  • CO2 Regulator (REG-1) 1

    CO2 Regulator (REG-1)

    Combines a precision regulator/ flow gauge and an industrial solenoid valve.

    $144.95 $118.95
  • Dual Tank CO2 Regulator (REG-2) 1

    CO2 Regulator (REG-2)

    The REG-2 connects TWO CO2 tanks to prolong the time between changing …

    $239.95 $193.50
  • CO2 System w/ Timer

    CO2 System w/ Timer

    Features a programmable timer that automatically maintains ideal CO2 levels …

  • CO2 Test Kit

    CO2 Test Kit

    An inexpensive alternative to costly electronic monitors. Measure from 300 to …

  • CO2 Tubing 1

    CO2 Tubing

    Disperse CO2 evenly throughout your greenhouse or indoor garden with drilled …

  • Propane Conversion Kit

    Conversion Kit (LPC-1)

    Use to change a natural gas (NG) burner into a liquid propane (LP) burner.

    $41.95 $38.50
  • Natural Gas Conversion Kit 1

    Conversion Kit (NGC-1)

    Allows you to change a liquid propane burner into a natural gas burner.

    $41.95 $38.50
  • CO2 Monitor

    Desktop CO2 Monitor

    Independent CO2, temp, RH readings are displayed on a high-res LDC screen.

    $144.95 $130.50
  • Environmental Controller (CHHC-4) 1

    Environmental Controller (CHHC-4)

    Use to operate ALL of your growing area conditions accurately and reliably.

  • Environmental Controller

    Environmental Controller (DEC)

    Combine CO2, temperature and humidity control with digital precision in ONE …

    $229.95 $206.95
  • Environmental Controller (EVC-1) 1

    Environmental Controller (EVC-1)

    Designed to maintain a specific temperature and humidity within your growing …

    $180.00 $132.00
  • CO2 Expansion Regulator (CO2-EXP) 1

    Expansion Regulator (CO2-EXP)

    Connect CO2-EXP to any 20 lb or 50 lb tank and to the CO2-REG and you’re …

  • Xtreme Greenhouse Controller (XGC-1e) 1

    Greenhouse Controller (XGC-1e)

    Operates all of the main devices required in today’s modern hydroponic garden …

    $869.95 $694.00
  • HydroGEN PRO CO2 Generator 1

    HydroGEN PRO

    Includes a water to air heat exchanger that removes 86% of the heat produced …

    $429.95 $386.95
  • iPonic 600 Environmental Controller

    iPonic 600

    Allows you to monitor and control your grow room — via smart phone, computer …

    $1,399.00 $1,054.95
  • Propane Cross-Over Valve

    Propane Cross-Over (LXO-1)

    Allows you to connect a propane CO2 generator to two tanks so that when one …

    $81.95 $68.95
  • Temperature-Humidity & CO2 Controller 1

    Temperature-Humidity & CO2 (AIR-4 )

    Includes all the features of the AIR-3 with the addition of independent temperature …

    $249.95 $199.95
  • Variable CO2 Generator (VCG-27) 1

    Variable CO2 Generator (VCG-27)

    Carbon Dioxide (CO2) is critical for all plants. Normal atmospheric air around the world averages about 380 Parts-Per-Million (PPM.) When ...

  • Variable CO2 Generator (VCG-6) 1

    Variable CO2 Generator (VCG-6)

    The Sentinel VCG-6 CO2 Generator has two models, the LP (propane) and an NG (natural gas) model. Both come complete ...