difference in bubble count - The Planted Tank Forum
 
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post #1 of 8 (permalink) Old 10-18-2007, 02:05 AM Thread Starter
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difference in bubble count

i have pressurized co2 system and use co2 grade tubing from the regulator to the bubble counter. I use silicone tubing from the bubble counter to the glass diffuser. I noticed that there is a difference in the number of bubbles I counted. The bubble counter shows 113 bpm, while the end of the silicone tubing has around 46bpm. Does this sound normal? I know that bubble size can effect the count, but i cant really tell the difference in sizes.
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post #2 of 8 (permalink) Old 10-18-2007, 02:14 AM
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How long is the length from the bubble counter to the diffuser?

1) Bubble size inconsistencies.
2) Leakage of CO2 through the silicone tubing.
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post #3 of 8 (permalink) Old 10-18-2007, 02:24 AM Thread Starter
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silicone tubing length is about 2 feet, which is how tall my aquarium is. I have the bubble counter attached to the glass at the top, while the silicone tubing runs all the way down to the glass diffuser located at the very bottom of the tank.
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post #4 of 8 (permalink) Old 10-18-2007, 02:29 AM
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Maybe a Leak at the top of bubble counter and Little hole in your tubing. The bubbles Fusing together

Or its true silcon tubes leak

One month in.
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post #5 of 8 (permalink) Old 10-18-2007, 03:49 AM Thread Starter
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i wish i didnt have to use the silicon tubing, but i cant fit the co2 tubing into the diffuser. Couldnt find any leaks from the bubble counter. I purchased it from the vendor that sells the rhinox diffusers. Looks like a well built bubble counter to me. I guess it is the silicon tubing.
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post #6 of 8 (permalink) Old 10-18-2007, 03:52 AM
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2 feet will leak...~12%. Not enough to account for the huge difference in bubble rates. Maybe bubble size discrepancy.
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post #7 of 8 (permalink) Old 10-18-2007, 08:18 AM
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It is probably just the bubble size, but you may want to check your for leaks. I had a leak in my bubble counter which caused me to lose most of my co2. Check around the edges with warm soapy water.
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post #8 of 8 (permalink) Old 10-18-2007, 10:24 AM
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As long as the silicone tubing is in the water any CO2 that leaks though the wall is being diffused. I would guess this is a simple matter of different bubble size. Which goes to show why bubble rates are pretty much meaningless except for each specific tank.
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