How many CO2 bubbles per minute?

[BiZAceTriZ]

i'm having trouble trying to figure out how much CO2 is needed for my 17 gallon tank

the ph is around 6.4-6.6
Kh about 2-3degrees

question is how many CO2 bubbles in one minute?

[John N.]

2 bubbles per second (bps) is a good place to start. You'll find that you'll probably end up around 2-4 bps.

-John N.

[Mgamer20o0]

well it all depends on how well the co2 mixes in the water.

http://www.csd.net/~cgadd/aqua/art_plant_co2chart.htm

[Rex Grigg]

i'm having trouble trying to figure out how much CO2 is needed for my 17 gallon tank

the ph is around 6.4-6.6
Kh about 2-3degrees

question is how many CO2 bubbles in one minute?

You need enough bubbles to get 30 ppm of CO2. But first you need to get better tank readings. Why? Let me show you.

pH 6.4 KH 2° = 23.9 ppm
pH 6.4 KH 3° = 35.8 ppm

pH 6.6 KH 2° = 15.1 ppm
pH 6.6 KH 3° = 22.6 ppm

So all you really know is either you have plenty of CO2 or not nearly enough.

[BiZAceTriZ]

Well i've checked again and my ph is around 6.5
KH around 2 degrees
btw, how do you calculate the amount of CO2 by using ppm?
is there a way to measure it?

[livingword26]

Here is a pdf chart form Rex Grigg's site that you can download:

http://www.rexgrigg.com/co2.pdf

Or here is a jpeg from the internet:

http://img310.imageshack.us/img310/6489/co24bu.jpg

[Mgamer20o0]

http://www.csd.net/~cgadd/aqua/art_plant_co2chart.htm

[loaches r cool]

Well i've checked again and my ph is around 6.5
KH around 2 degrees
btw, how do you calculate the amount of CO2 by using ppm?
is there a way to measure it?

I think your a bit confused. You dont calculate co2 using ppm, ppm is a unit of measure for co2 concentration (parts per million). You calculate co2 by using pH and KH like in the link mgammer2000 has posted twice as well as others. But that method is very inaccurate. You can see that by your rough estimates how much variance there could be (as pointed out in rex's post). Cheap test kits arent very accurate plus your reading of the test kit isnt accurate either. Then you have two different tests and the error multiplies. It wouldnt be an exaggeration to say you would have +100%/-50% margin of error using test kits and the calculator/charts.
You might want to look into a DIY drop checker, they are usually the best way accurately gauge the co2 in your tank.

[BiZAceTriZ]

ok i appreciate the help
thank you guys