HELP needed What is max level of CO2? - The Planted Tank Forum
LinkBack Thread Tools Display Modes
post #1 of 3 (permalink) Old 08-29-2019, 06:14 PM Thread Starter
susann's Avatar
PTrader: (0/0%)
Join Date: Aug 2019
Posts: 1
Question HELP needed What is max level of CO2?

I am really needing help since I canít find any good information on this. I have plants only aquarium and since I know that CO2 is good for plant growth I have arrived at this question:

What is the and maximum value of CO2 ppm that I can diffuse in the water to get very good effects?

And I mean here like maximum level for the best results and also the level when things might get bad as for the water turning too acidic.

From the information that I could find online it said that 30ppm is good because then itís good both for plants and fish but since I donít have any fish in my tank I was curious how much I can actually raise the CO2 ppm value.

I would be very thankful for any help!

susann is offline  
Sponsored Links
post #2 of 3 (permalink) Old 08-30-2019, 12:06 AM
Darkblade48's Avatar
PTrader: (3/100%)
Join Date: Jan 2008
Location: Toronto/Singapore
Posts: 11,505
You could probably crank it to 40 or even 45 ppm.

There is a point though, where the amount of CO2 loss will offset the amount you're injecting though, and CO2 will only drop pH to a certain pH as well.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Eheim Pimp #362 - Eheim 2213 x2, Eheim 2028, Eheim 2217, Eheim surface skimmer and Eheim autofeeder.
Victor Pimp #33 - HPT272-125-350-4M
Darkblade48 is offline  
post #3 of 3 (permalink) Old 08-30-2019, 12:14 AM
Wannabe Guru
PTrader: (0/0%)
Join Date: Feb 2017
Location: PA
Posts: 1,354
Of late, I've been dropping back from my ~40ppm area, not least of the reasons being that I now run it 24/7. However, my primary reason is to target what I believe is the pH 'sweet spot' for nutrient uptake by most plants. This seems to be in the pH 5.8-6.5 area. So, I watch my KH levels and adjust my CO2 accordingly. My plants grew fine at lower pH levels, but i'm in the fine-tuning stages of a year-long shift in overall strategy and don't believe the extra CO2 is helping anything..
Deanna is offline  

co2, co2 advice, help me, planted aquarium

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

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