calculating CO2 concentration - The Planted Tank Forum
LinkBack Thread Tools Display Modes
post #1 of 9 (permalink) Old 04-02-2003, 12:12 AM Thread Starter
PTrader: (0/0%)
Join Date: Mar 2003
Posts: 61
okok, i know there are charts and all, and i have found an equation, but it has to be flawed. i am wanting to put it into a spread sheet, so i can have a daily record of my CO2 levels, and what not.



doooog is offline  
Sponsored Links
post #2 of 9 (permalink) Old 04-02-2003, 02:41 AM
PTrader: (9/100%)
Join Date: Jul 2002
Posts: 2,647
Its flawed to the extent of the accuracy of your ph and kh testing. It can also be rendered useless if there are buffers or acids in the tank other than carbonates.

m.lemay is offline  
post #3 of 9 (permalink) Old 04-02-2003, 04:26 AM Thread Starter
PTrader: (0/0%)
Join Date: Mar 2003
Posts: 61
i'm sorry, i should say that there was an error in it and i was after a corrected equation
doooog is offline  
post #4 of 9 (permalink) Old 04-02-2003, 04:31 AM Thread Starter
PTrader: (0/0%)
Join Date: Mar 2003
Posts: 61
his equation had 7-pH at the end--> my pH is right around 7 to 7.2 and that results in multiplying by 0 and that isn't cool, and it also give me "high" negative numbers if my pH is 7.2

CO2 (in PPM) = 3 * KH * 10( 7-pH ), is what i found


doooog is offline  
post #5 of 9 (permalink) Old 04-02-2003, 07:25 PM
Planted Tank Enthusiast
SNPiccolo5's Avatar
PTrader: (0/0%)
Join Date: Oct 2002
Location: Minneapolis, MN
Posts: 859
The correct formula is 3.6*KH*10 ^ (7-pH)

I use 3.6, but have seen equations with 3, I'm not sure which one is accurate. By taking 10 to the power of (7-pH), it is impossible to get negative numbers or multiply by 0. Hope this helps!

SNPiccolo5 is offline  
post #6 of 9 (permalink) Old 04-02-2003, 07:40 PM
Planted Member
PTrader: (1/100%)
Join Date: Feb 2003
Location: Madison,WI
Posts: 158
Heck if you don't want to calculate bookmark this page!


20G heavily planted tank with Eco Complete
Pressurized CO2, Eheim Ecco 2236, 1 55W and 1 36W bulb
kor4ever is offline  
post #7 of 9 (permalink) Old 04-02-2003, 10:04 PM Thread Starter
PTrader: (0/0%)
Join Date: Mar 2003
Posts: 61
you see kor4ever, i was attempting to avoid having to go to a website every time i wanted to calulate this, this way all i have to do is type in my Kh and pH values, and then i have the calulation done for me.

And A BIG thanks to Tim

doooog is offline  
post #8 of 9 (permalink) Old 04-02-2003, 11:52 PM
Planted Tank Obsessed
ridns's Avatar
PTrader: (0/0%)
Join Date: Aug 2002
Location: Rockford,IL
Posts: 349
I have been trying to do the same thing! I must be to thickheaded to understand tho. I hope you get a good answer so I can use it too!

Eheim pimp #128, 55gal 13x20x48, Eheim Pro 2227, CO2 injected, into the filter breather tube,4x 55w Pcs , 12 hr light cycle (sunrise/sunset simulated), Milwaukee SMS 122, faulty bubble counter replaced with M3 bubble counter..... moderately Planted, Plantex CSM+B and ferts

To steal ideas from one person is plagiarism; to steal from many is research
ridns is offline  
post #9 of 9 (permalink) Old 04-03-2003, 12:29 AM Thread Starter
PTrader: (0/0%)
Join Date: Mar 2003
Posts: 61
it worked
doooog is offline  


Quick Reply

Register Now

In order to be able to post messages on the The Planted Tank Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:


Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode

Similar Threads
Thread Thread Starter Forum Replies Last Post
CO2 concentration GraemeK General Planted Tank Discussion 4 06-17-2004 07:07 PM
Calculating c02 Alec General Planted Tank Discussion 1 02-14-2004 09:51 PM
CO2 Air Concentration hypsophrys Equipment 7 01-03-2004 09:26 AM
Calculating CO2 when using Blackwater additives Saluki Fertilizers and Water Parameters 2 08-05-2003 11:46 PM
Calculating Co2 levels BonesCJ Fertilizers and Water Parameters 5 02-14-2003 02:06 AM

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome