CO2 injector - The Planted Tank Forum
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post #1 of 4 (permalink) Old 08-21-2010, 06:23 AM Thread Starter
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CO2 injector

hi i am looking into adding co2 to my tank. i own a co2 tank, it is 8-12 oz im not sure. i have purchased the tubing and the diffuser. what else would i need to go with the tank method. if the price is to high i will do the yeast reactor. and how long would my co2 tank last doing 1-2 bubbles a second
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post #2 of 4 (permalink) Old 08-21-2010, 06:28 AM
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You need a regulator...

Take a look at this excellent write-up by Darkblade:
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post #3 of 4 (permalink) Old 08-21-2010, 06:56 AM
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You will need a regulator and a needle valve, at the very least. A solenoid would also be recommended, as it will allow you to control your CO2 using a timer (or a pH probe, if you are so inclined).

It is hard to say how long your CO2 tank will last; it will depend on the size of tank you buy (also, this excludes unexpected occurrences, such as a leak when initially setting up the system, etc).


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post #4 of 4 (permalink) Old 08-21-2010, 05:32 PM
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If you can possiby afford it, I'd sugest you get at least a 5lbs. tank. A 12oz. tank is probably a paintball tank. Not only will it require you to get special adapters for it to fit on the regulator, but unless you have a shut off valve installed, you'll lose some CO2 when you screw it on.

The initial cost of a CO2 tank or replacement plan may seem high at first, but once you've put down that 80 bucks or so, it's cheap city from that point on. You're only going to pay 10-15 dollars for a refill, and they will be a very long time in between. I've been running a 5lb tank on my 65 gal since may and it still feels like it is over halfway full with the highly accurate, percision "pick it up and see if it's heavier than an empty tank" test.
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