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A "solenoid" is an electrically controlled valve. By connecting the solenoid to a timer, you can shut off the CO2 at night when plants aren't using it, and make the CO2 last longer before a refill.
 

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SCAPEr
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Discussion Starter · #3 ·
A "solenoid" is an electrically controlled valve. By connecting the solenoid to a timer, you can shut off the CO2 at night when plants aren't using it, and make the CO2 last longer before a refill.

o.....

i c now. no wonder my 20z paintball tank last about 4 weeks.
 

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yeah and its on 24/7 hehe

No really it's because the amount of gas in it is so small. I could at max squeeze 3 months out of it on a 20 gallon. And just a heads up. You'll get a lot more respect on this forum if you type in complete sentences and not l337 5p34k
 
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