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Aquarium CO2 Calculators !

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Aquarium CO2 Calculators !

Post by Admin on Tue Oct 25, 2011 9:52 pm

Here Arrow http://www.fishfriend.com/aquarium_co2_calculator.html

Here Arrow http://www.theaquatools.com/co2-calculations

Based upon the above my `Dawn` CO2 Value was > 2.1049863812345446 ppm ....

Another Equation by `the Krib`s`Roger Miller claiming to have greater accuracy Here Arrow

log(CO2) = pH(a) - pH(t) - 0.3 Very Happy

http://www.thekrib.com/Plants/CO2/kh-ph-co2-chart.html


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Re: Aquarium CO2 Calculators !

Post by DaveB on Wed Oct 26, 2011 3:46 am

Mio
By my calculation my Co2 this morning are levels are
1.3712645688446256
I am getting the same reading 5 min ago (dusk) due to p.H & K.H being the same. Therefore no or very little photosythisis going on due to recent blanketweed treatment and covers going on. Hope this means I have loads of air going in, driving out the CO2
Great Links

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Re: Aquarium CO2 Calculators !

Post by Admin on Wed Oct 26, 2011 4:46 am

Well I just tested mine again applying George Millers Formula this time ?

Pics are `Dire` Embarassed but it`s pouring down and a tad cold out there now Rolling Eyes







PH (A) 7.42 - PH (t) 7.71 - 0.3 = 0.01 Very Happy Hope I havn`t screwed up the Math Rolling Eyes

Not sure IF the PH Probe should have been left in the water whilst aerating/off gassing the C02 Question

and then tested after 1 minute Question Next time I test I will leave the Probe out until aeration is completed by way of a comparison Very Happy

I have NOT fed them today though due to the `Nitrite` Value Twisted Evil


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Re: Aquarium CO2 Calculators !

Post by DaveB on Wed Oct 26, 2011 5:51 pm

Tested again this morning after rain last night 7.29 , unfortunately my KH always 1 or less even when using double the sample. so CO2 = 1.5385841519740943
Just as a matter of intersest My ORP level incresaes by 20mv due to the change in p.H even though some polutants must of entered the pond.

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Re: Aquarium CO2 Calculators !

Post by Admin on Wed Oct 26, 2011 6:10 pm

DaveB wrote:Tested again this morning after rain last night 7.29 , unfortunately my KH always 1 or less even when using double the sample. so CO2 = 1.5385841519740943
Just as a matter of intersest My ORP level incresaes by 20mv due to the change in p.H even though some polutants must of entered the pond.

I doubt much by way of pollution would have entered the Pond Dave with the cover on Very Happy

Have you tried George Millers `equation` method yet?

Test the sample PH .. aerate for one minute then test again using the `Formula` to evaluate CO2 ?


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Re: Aquarium CO2 Calculators !

Post by DaveB on Wed Oct 26, 2011 6:43 pm

Admin wrote:
DaveB wrote:Tested again this morning after rain last night 7.29 , unfortunately my KH always 1 or less even when using double the sample. so CO2 = 1.5385841519740943
Just as a matter of intersest My ORP level incresaes by 20mv due to the change in p.H even though some polutants must of entered the pond.

I doubt much by way of pollution would have entered the Pond Dave with the cover on Very Happy

Have you tried George Millers `equation` method yet?
Test the sample PH .. aerate for one minute then test again using the `Formula` to evaluate CO2 ?

I will give it a go later today. I have always thought as I don,t have much of a slope on the covers there is still quite a bit of water gets in there, However I have recently removed the silver birch which overhangs the pond( relunctantly) as I believe this was a major contribution to polution at different times of the year. I don,t seem to get the sudden drop in ORP readings after a down pour of rain which I did before cutting the tree down, even with a slight drop in p.H( which I would expect to be the otherway around)

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Re: Aquarium CO2 Calculators !

Post by Admin on Wed Oct 26, 2011 6:59 pm

There can be considerable variation in PH/ORP comparisons Dave ?

My ORP Value on the WLP was higher than that of the `Show` Vat despite the Goldfish pond having a higher PH ?

The TDS is 300 ppm more due to Salinity in the Show Vat though which might account for the deficit ?

Sorry you had to sacrifice the `Silver` Birch Dave Crying or Very sad I remember the pics of it ..why don`t you post it in the Gallery Forum ? it was a beautiful Tree Very Happy

I had to sacrifice the second Koi Pond similarly Rolling Eyes which was situated directly in front of a row of Leylandi and was permanently covered in their shed debris ..Twisted Evil




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Re: Aquarium CO2 Calculators !

Post by Admin on Wed Oct 26, 2011 11:02 pm

An Experiment Exclamation

I took the probe out during aeration this time Rolling Eyes

Supply Water starting PH Arrow



PH following 1 minute aeration Arrow



PH following 2 minutes aeration Arrow



PH following a further 5 minutes aeration Arrow



PH following 1 hour aeration Arrow

This is the highest PH agitation achieved thus far ?



I will simultaneously run a `Breathed On` (standing) PH experiment with supply water and test it post 24 hours by way of a comparison ...

Starting PH Arrow





I am managing to get some work done in between Guys honest Laughing


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Re: Aquarium CO2 Calculators !

Post by Admin on Fri Oct 28, 2011 2:21 am

The `Breathed` on standing water had visibly trapped gasses post 24 hrs due to these forming upon imperfections in the Glass more quickly than they were being expelled at the Air/Water interface ... which is temp/pressure dependent.



Note the aerated water on the left has no such bubbles remaining reflected in the final differences in PH ....


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