Question about CO2 bubble counter - The Planted Tank Forum
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post #1 of 3 (permalink) Old 09-22-2005, 02:24 PM Thread Starter
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Question about CO2 bubble counter

Hi all,

I had the Nutrafin CO2 plant system with the Hagen ladder. Recently I bought pressurised CO2 and kept the ladder for CO2 diffusion. Yesterday I recieved the Dupla bubble counter I had ordered 3 weeks ago So now the bubbles pass through the dupla counter and enter the aquarium through the Hagen ladder.
I have a 160lt aquarium and as I had read in some threads here, I had adjusted the CO2 so I could have about 60 bpm counted at the Hagen ladder. I readjusted the CO2 and the difference with the dupla counter is the following: 40bpm from the Hagen are equal to 65bpm from Dupla.
So which bubble counter should I use for my adjustment? The Dupla or the Hagen? I know that the ammount of CO2 is the same whichever bubble counter I use as the volume is the same. What I think is to messure the CO2 through the pH/kH table and then readjust the CO2 with whichever bubble counter I like.
Does anyone of you have used a dupla bubble counter with a about 160lt aquarium, so you can tell me how many dupla bubbles per minute should I have?


Ioannis Stellas
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post #2 of 3 (permalink) Old 09-22-2005, 02:30 PM
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Forget about the bubbles. They are only to give you a rough approximation of the flow rate of the CO2. Use the PH and KH reading of your aquarium to measure and target 30 ppm of CO2.

P.S. I think most people (myself included) use a bubble counter because our CO2 is injecting into an inline reactor where we cannot see any bubbles. If you are using the ladder, that is the bubble counter.

Jeff B

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post #3 of 3 (permalink) Old 09-22-2005, 03:57 PM Thread Starter
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Jeff thanx for your answer.

Actually I am planning of making an inline reactor in the next couple of months...
I asked that because I had used some black peat in the filter and everybody told me that I had to remove it, make 500% WC (not all in one ), because it is affecting the CO2 readings. I have made all these things but I am not sure if my meassurements are now accurate by getting the pH/kH numbers.

Thanx again, that's what I had thought of doing.

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