question on DYI CO2 - The Planted Tank Forum
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post #1 of 7 (permalink) Old 03-10-2018, 05:17 PM Thread Starter
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question on DYI CO2

Hi all. I set up my own DYO CO2 with citric acid and Na Bicarb. I purchased an inexpensive connecting kit with a pressure gauge and air flow adjustment valve to connect the two bottles. I then connected the tubing from the sir adjustment valve to a bubble counter and on to my diffuser. It worked wonderfully for several weeks. This last time I mixed up a new batch of citric acid and Na bicarb I could not get the air flow adjustment valve to shut down tight enough to not let the CO2 escape. The CO2 just escaped at a rapid rate until all the pressure displayed on the gauge was gone. I thought maybe it was an incompetent valve and so I purchased another set. However this set is doing the same thing. Any thoughts?
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post #2 of 7 (permalink) Old 03-10-2018, 05:22 PM
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Use soapy water or windex on all seals to check for leaks. My bet is on a leak from one of the bottle caps or hoses - they fail often on the cheap kits.
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post #3 of 7 (permalink) Old 03-10-2018, 07:52 PM Thread Starter
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Thanks. Do you know of anything else I can use that might be more reliable. The tank and the area I have it in is too small for pressurized CO2. thamks
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post #4 of 7 (permalink) Old 03-10-2018, 11:30 PM
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Thanks. Do you know of anything else I can use that might be more reliable. The tank and the area I have it in is too small for pressurized CO2. thamks
You could go with a paintball canister setup. If you are already doing 2 liter bottles, it's only an inch or two taller if you go with a 24 oz bottle.

Other than that, I have the D501 DIY CO2 kit, and that has worked really well for me. Have to change out the O rings every 7-8 refills, but that's the only time I ever have a leak.
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post #5 of 7 (permalink) Old 03-16-2018, 04:00 PM
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I bought, probably the same kit as you, and I have found that the control valve is incredibly finicky. I think mine still allows a bubble every 5 or 6 seconds and tight as I can close it every night... but hasn't seemed to bother the fish or anything for over a month so I've kept it. I plan on doing the paintball canister setup eventually, I see it being the better alternative in the long run.

-Zachary-
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post #6 of 7 (permalink) Old 03-17-2018, 04:10 AM
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I bought, probably the same kit as you, and I have found that the control valve is incredibly finicky. I think mine still allows a bubble every 5 or 6 seconds and tight as I can close it every night... but hasn't seemed to bother the fish or anything for over a month so I've kept it. I plan on doing the paintball canister setup eventually, I see it being the better alternative in the long run.
If you are manually opening and closing the needle valve to turn it on and off, I'd recommend picking up some of these and using them as the shut off instead:

https://www.amazon.com/gp/aw/d/B00025676Y/

I use them for drip acclimation, but they work well as a shutoff valve, and then you don't have to try to "dial in" (as if you actually can with these...) the needle valve every morning.
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post #7 of 7 (permalink) Old 03-20-2018, 03:57 PM
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If you are manually opening and closing the needle valve to turn it on and off, I'd recommend picking up some of these and using them as the shut off instead:

https://www.amazon.com/gp/aw/d/B00025676Y/

I use them for drip acclimation, but they work well as a shutoff valve, and then you don't have to try to "dial in" (as if you actually can with these...) the needle valve every morning.
You, sir, are an evil bellied genius. I may just do that, Thanks for the tip!
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