Titan Controls Apollo 2: Cycle Timer w/ Photocell is no longer available

Titan Controls Apollo 2: Cycle Timer w/ Photocell is no longer available

SKU #: HGC702740

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The ETL listed Apollo 2 Recycle Timer with photocell provides the perfect solution to your short cycle timing requirements!

The Apollo 2 has a 10 second to 20 minutes 'ON TIME' to activate your grow gear, and 1 minute to 12 hours 'OFF TIME' to turn it off as needed. It can be set for daytime only, nighttime only or both day and nighttime control. Now you can dial your CO2, pump or fan to exacting schedules and control your garden to achieve its maximum potential.

  • 10 seconds to 20 minutes 'ON TIME'
  • 1 minute to 12 hours 'OFF TIME'
  • ETL listed in US and Canada for commercial applications
  • Controls timed equipment during daytime only, nighttime only or both day & night
  • Plastic enclosure protects internal components from dust and moisture
  • Use to time CO2, fans, pumps, misters, ebb & flow systems and ozone generators
  • 120 Volts - 15 Amps - 60 Hz. - 1/3 HP
  • 3 year warranty
Tech Specs


BrandTitan Controls
Weight (lb.)0.65
Lead TimeDue to social distancing requirements, this product ships in 7-10 Business Days
Length (in.)5.5
Width (in.)5.8
Height (in.)3.3
Warranty2 Year
Prop 65No
Has PhotocellYes
Voltage120 Volts
Frequency60 Hz
UL ListedNo
Product Q&A

Titan Controls Apollo 2: Cycle Timer w/ Photocell Questions & Answers

Should I run my CO2 at night?

No, you should not. Plants photosynthesize CO2 only during the daylight hours. At night, the plants expire CO2 and have no use for CO2. Save yourself some money and only dose CO2 during daylight hours when it does the most good for the plants.

Why do gardeners enrich their growing space with CO2?

CO2 is proven to speed up a plants growth rate, improve overall health and increase a plants yield. There are also many other benefits to plants, among them greater resistance to temperature extremes and other forms of stress, better growth at low light intensities, improved root/top ratios and less injury from air pollutants.

What methods can I use to enrich CO2 in my indoor garden or greenhouse?

The two most common methods are using a CO2 generator/burner or bottled CO2. The most common generator/burner uses LP (liquid propane) gas from a tank or a NG (natural gas) conversion kit that allows you to hook up your generator/burner to the natural gas line in your house. The other option is to purchase bottled CO2 from a local supplier in your area and control its release into your garden area using a Titan Controls CO2 controller (Atlas 1) or short cycle repeat cycle timer with photocell. It should be noted that there is no advantage to increasing CO2 levels beyond 2000 PPM for most greenhouse plants. The optimum level of CO2 for plant growth is generally accepted at 1200 - 1600 PPM.