CO2 Water Diffusion - The Planted Tank Forum
 
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post #1 of 5 (permalink) Old 10-25-2011, 03:08 AM Thread Starter
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CO2 Water Diffusion

Assuming a tank initially has 30ppm CO2, Is it possible to calculate CO2 dissipation rate, knowing the parameters below, for CO2 ppm to decrease to a value where it's no longer viable for plant growth:

1) Water temperature/parameters
2) pH
3) Light lumens
4) tank size/volume

Is it an exponential formula?
Thanks
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post #2 of 5 (permalink) Old 10-25-2011, 03:32 AM
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5) kh
6)atmospheric pressure
7) water flow
8)surface agitation
9)water surface area
10)water depth
11)plant mass
12)bacteria content
13)ferts content
14)live stock
15)oxygen content(pearling)
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post #3 of 5 (permalink) Old 10-25-2011, 04:13 AM
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Man those are alot of variables to make a formula out of!! too many maybe

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post #4 of 5 (permalink) Old 10-25-2011, 04:58 AM
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in all seriousness the best thing i could suggest is
take a ph reading from tank before co2 is added(ph monitor)
add co2 until drop checker stabilizes to lime green
stop co2 diffusion and see how long your tank reaches original ph setting
this would have to be done during the day and would only give you a very vague idea on your tank setup only
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post #5 of 5 (permalink) Old 10-25-2011, 02:12 PM
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c02 concentrations can change within 45 minutes... ur dop checker doesnt need to be lime green to check.
frm 2 ppm no c02 injection to 45 minutes later u have approximately the level u have set for ur tank.my ph goes down from 7.8 to 6.2 in 45 minutes but it takes both my DC's around 4 hours to turn yellow

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