Diy co2 - The Planted Tank Forum
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post #1 of 8 (permalink) Old 02-11-2014, 08:30 PM Thread Starter
Join Date: Dec 2010
Location: Milwaukee Wi.
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Diy co2

How do you stop or reduce the CO2 at night
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post #2 of 8 (permalink) Old 02-11-2014, 08:44 PM
Algae Grower
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There really is no way that I am aware of. You would have to remove it from the tank (or turn off pump if it is inline) but I believe most run an air stone if they are concerned. I let mine run 24/7.
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post #3 of 8 (permalink) Old 02-11-2014, 08:45 PM
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Location: Tulsa, Oklahoma
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You cannot stop it; however, I place my airstone in at night and remove when I turn the lights on
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post #4 of 8 (permalink) Old 02-11-2014, 09:20 PM
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You can also attach a solenoid on a timer to stop the CO2. Or, you can attach a shutoff valve.
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post #5 of 8 (permalink) Old 02-11-2014, 09:26 PM
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For the most part you don't have to worry about it if you have adequate circulation and decent surface turbulence. A DIY co2 system will usually not make enough gas to poison your fish.

I have had my 20g hooked up to 2 1g bottles making co2 for several months now with no issues at night.
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post #6 of 8 (permalink) Old 02-12-2014, 12:31 AM
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Originally Posted by Solcielo lawrencia View Post
You can also attach a solenoid on a timer to stop the CO2. Or, you can attach a shutoff valve.
A solenoid does not really work for DIY CO2.

A shutoff valve is a bad idea, as the pressure can build up in the soda bottle and cause it to burst.


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post #7 of 8 (permalink) Old 02-12-2014, 01:54 AM
Algae Grower
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Location: LA
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Wouldnt it explode if you shut off the valve?

-bowfront, fluval 209, coralife 65watts 6500k on 12 hours ,1:1 flourite and pea gravel, DIY CO2, fully submerged 120Watt heater temp set at 79 F

-red ludwiga, riccia, microsword, amazon sword, indian water star, lloydiella green, water wisteria

-siamese algae eater, 2 panda cory, 10 neon tetra, 3 algae eating shrimp, 2 rainbow.. err.. rainbow somethings he he
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post #8 of 8 (permalink) Old 02-12-2014, 02:02 AM
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Location: FL
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Diy co2

Do you use a diffuser or a reactor? If you use a reactor, you can just stop the pump that is powering it and the CO2 will safely "burp" to the surface in large bubbles. Not using a reactor? Here's a reason to switch!
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