Co2 Regulator & Diffuser - Which is the problem? - The Planted Tank Forum
 
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post #1 of 6 (permalink) Old 10-09-2015, 04:23 PM Thread Starter
Algae Grower
 
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Co2 Regulator & Diffuser - Which is the problem?

I've got a regulator I bought from an LFS and a glass diffuser. Here is my issue. I open the valve to a setting and then dial in the rate of Co2 with the needle valve. After a a minute or so the rate slows. It seems to not have enough pressure to keep the Co2 pumping out at the same rate I set it. So I open the main valve a little more and reset the needle to where I want and again after a minute or so the rate slows too much. Doesn't seem to matter how much I have the main regulator valve open or how much I dial in with the needle valve.

The only way, it appears, to not have it slow down is to have it open far too much where the Co2 is just pouring out.

What is my issue?
#1. Poor quality regulator?
#2. Diffuser/check valve creating too much back pressure?
#3. User Error?

Thanks for the feedback.
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post #2 of 6 (permalink) Old 10-09-2015, 05:00 PM
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What is the working pressure? Usually the right gauge setting. When that's happened to me increasing the working pressure solves the problem.
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post #3 of 6 (permalink) Old 10-09-2015, 06:18 PM
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Is there a bubble counter in your CO2 plumbing?

-mootay
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post #4 of 6 (permalink) Old 10-09-2015, 07:02 PM
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Diffusers require a certain amount of working pressure to work, so it really depends on what you're running and the diffuser type.

Also, it takes a bit for the pressure to stabilize in the tubing when the co2 kicks on. I'd let it run for a while and let it settle before making any changes to it.

I'm guessing too little working pressure though in this case. Be sure you're running what is called for with your diffuser.
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post #5 of 6 (permalink) Old 10-09-2015, 07:52 PM Thread Starter
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The diffuser looks like this...


Not my tank, but the diffuser is pretty much the same. The one pictured is a bit larger than mine. But same model.

I have a check valve from the same company as the diffuser.

The working pressure is harder to answer because that gauge is broken. So I'm trying to hand adjust without it until the replacement comes. With the broken working pressure gauge out of the box I am a bit skeptical of the quality and looking to possibly pony up for a GLA regulator. I'm also about to change to an inline diffuser which I think will be more efficient at using the Co2.
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post #6 of 6 (permalink) Old 10-09-2015, 07:54 PM
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It's probably a working pressure issue then.

The inline requires a working pressure of 30 or more I believe. Not sure about yours.

I have a gla regulator. Worth the investment. Haven't had any issues with co2 levels in 2 years

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