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Discussion Starter · #1 ·
Hi. I have a primo co2 system from greenleafaquariums and I just set it up. The diffuser is a atomic diffuser 60mm. I had a question about the bubble rate. I originally set it to one bubble per second, but the bubble rate slows down. Is this normal? I though the bubble rate should always remain at 1 bubble per second. Any thoughts?


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I suspect that because you are using an atomic that the preasure in the line is building up to the 30 to 40 PSI min needed to flow through the atomic diffuser.

So basically, you have your regulator set to a certain PSI, as the line presure starts out lower, your bubbles move out quickly, as you reach the working preasure of the atomic difuser the bubble count slows down.

The slower bubble count is what you need to base your count off of.


LionelC
 

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If your pressure is set too low it becomes harder to set the needle valve and have it stay at that setting. I found 30 to 35 psi made it easier to adjust a constant bubble rate. It also gets easier with time, not sure why, but it did for me.
 

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Discussion Starter · #4 ·
I tried setting the working pressure to 37 psi, but it just drops down to 30 and the diffuser bubbles slow down. This is very confusing. Is there some sort of article that will help me with this problem? I found one fish dead when I returned home


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If the working pressure drops with a full tank then the regulator is defective. I would call GLA and have them work it out.

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Just a thought but did you do this before the co2 tank temperature evened out to room temperature? When I first started I thought my tank was bad or regulator too cause the pressure kept changing but I realized it was the temp of the co2. The pressure changes depending on the gas temp.

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