CO2 bubble count. - The Planted Tank Forum
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post #1 of 17 (permalink) Old 03-05-2009, 12:28 PM Thread Starter
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CO2 bubble count.

is there any "magic number" of bubbles per second you want to try and achive? after a lot of reading and a ton of tinkering i have a mixture that is producing 1 bubble per 3 seconds. good? bad? suggestions? Thanks.
Sorry CO2 noob.
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post #2 of 17 (permalink) Old 03-05-2009, 01:38 PM
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the bubble count you want depends on the size of the tank and the disbursement method.

1 bubble per 3 seconds is very slow, but may be all you can get with your DIY mixture. if you add more yeast you will get a higher rate, but it will burn up the sugar quicker. You can also use multiple bottles to get a higher rate.

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post #3 of 17 (permalink) Old 03-05-2009, 02:22 PM Thread Starter
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its a 10 gallon and im using a powerhead reactor.
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post #4 of 17 (permalink) Old 03-05-2009, 03:00 PM
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yeah... to be honest the only way you'll know is to find out your CO2 concentration. You can do this via buying a drop checker and 4dKH water or there are ways to use your pH and hardness readings to approximate CO2 concentrations.

I ran 1 bottle via powerhead on my 29g for a while but i don't really know how useful it actually was. The power head didn't break up the CO2 very well, which is basically the most important aspect of getting good CO2 dispersal.
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post #5 of 17 (permalink) Old 03-05-2009, 05:33 PM
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Bubble per minute (BPM) is a reference that is only valid on an individual tank. The amount of CO2 necessary to reach a level of say 30ppm will vary from tank to tank depending on the volume of the tank, the Kh of the tank, the method of diffusion, the amount of surface agitation, the surface area and other things. BPM allows you to easily monitor and adjust the amount of CO2 that you are injecting. I also use it to let me know when it is time to change the DIY CO2 mix.

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post #6 of 17 (permalink) Old 03-05-2009, 09:12 PM Thread Starter
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well see i did that test with the chart thing and it says my concentration would be WAY over 30ppm but after all my reading and stuff i find that hard to be possible being that i have 1 diy bottle at roughly 20 bubbles per minute... any thoughts?
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post #7 of 17 (permalink) Old 03-05-2009, 09:16 PM
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well see i did that test with the chart thing and it says my concentration would be WAY over 30ppm but after all my reading and stuff i find that hard to be possible being that i have 1 diy bottle at roughly 20 bubbles per minute... any thoughts?
Use a drop checker. It's more accurate than the kH/pH chart for CO2 concentration.
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post #8 of 17 (permalink) Old 03-05-2009, 09:21 PM Thread Starter
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just dont have the money atm to order one and didnt want to wait more for one to come in... . oh well i guess.
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post #9 of 17 (permalink) Old 03-05-2009, 11:08 PM
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just dont have the money atm to order one and didnt want to wait more for one to come in... . oh well i guess.
I feel your pain on the money thing I am a full time college student who doesnt work. I have been trying to get a stable DIY CO2 system set up and I finally realized the other day that the first thing I should have done was bought a drop checker. It doesnt do me any good to figure out a setup that gives me a consistent output of 30 bpm when I dont even accurately know what 30 bpm is doing in my tank. Green Leaf Aquariums has some good drop checkers and the last order I placed with them arrived in something like three days.

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post #10 of 17 (permalink) Old 03-06-2009, 12:17 PM
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If you're a full time college student(like me) you can at least afford to build a DIY drop checker and get some 4dKH water.

just search around and you'll find something. Even the nice glass ones are only $10
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post #11 of 17 (permalink) Old 03-06-2009, 01:16 PM Thread Starter
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Im going to order a DC but as for now theres prolly no a way i am over dosing co2 with a diy bottle at about 20 bubbles per minute, right? I just got a few rummynose the other day and dont want them to die off just wanted a slight bit of reassurance. Thanks for all your help! elliot.
P.S. any good shops for DC's other than green leaf?
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post #12 of 17 (permalink) Old 03-06-2009, 03:25 PM
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Originally Posted by etbarry View Post
Im going to order a DC but as for now theres prolly no a way i am over dosing co2 with a diy bottle at about 20 bubbles per minute, right? I just got a few rummynose the other day and dont want them to die off just wanted a slight bit of reassurance. Thanks for all your help! elliot.
P.S. any good shops for DC's other than green leaf?
You shouldnt have any problem with overdosing CO2. The cheapest place that I found to get DC's is ebay but the really cheap ones come from Hong Kong and I am not comfortable buying them but lots of people have with no problem.

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post #13 of 17 (permalink) Old 03-06-2009, 03:44 PM Thread Starter
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ya idk about that either i mean the green leaf one isnt that much if you look at the fact that it comes with the large bottle of solution etc. prolly just order that. thanks.
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post #14 of 17 (permalink) Old 03-06-2009, 03:57 PM
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You shouldnt have any problem with overdosing CO2. The cheapest place that I found to get DC's is ebay but the really cheap ones come from Hong Kong and I am not comfortable buying them but lots of people have with no problem.
yeah i ordered from them just fine and it actually shipped pretty fast...unlike some orders from Malaysia that took weeks.

But then you also have to buy solution so...it's kinda of a toss up.
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post #15 of 17 (permalink) Old 03-06-2009, 05:17 PM
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I use 1 tsp of fast rise bread yeast with 2 cups of sugar in my DIY setup on my 10g and that gets me 1 bps for 1 week. 1 bps on my 10 gal keeps my DC nice and green. 20 bpm and I would still be in the blue with hair algae growing faster than plants.

I got my DC from GLA and was very pleased with the quality and service.

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