This site is supported by the advertisements on it, please disable your AdBlocker so we can continue to provide you with the quality content you expect.
  1. Dismiss Notice
  2. We are after as many aquarium plant images that we can get, doing so will assist us in completing the aquarium plant database.

    https://barrreport.com/threads/aquatic-plant-images-wanted.14374/
    Dismiss Notice

Co2 Injection Vs Ph Drop

Discussion in 'CO2 Enrichment' started by FxFocus, Aug 21, 2018.

  1. FxFocus

    FxFocus New Member

    Joined:
    Aug 17, 2018
    Messages:
    9
    Likes Received:
    0
    Local Time:
    6:31 PM
    In the context of PH8 GH9 KH5 before adding CO2...
    Under what circumstances would you not get a PH drop when injecting CO2?

    I ask this after having been told the following...

    "You can add CO2 to the point of saturation. After that it's just carbonic acid.
    If you stop before the carbonic acid starts to form, no PH drop."

    Is this right?
    Sounds daft to me but I'm no chemist lol
     
  2. tiger15

    tiger15 Member

    Joined:
    Aug 12, 2017
    Messages:
    221
    Likes Received:
    77
    Local Time:
    1:31 PM
    When you inject CO2, it can enter water in ionic form (carbonic acid) and free form (free gas and mist). A high efficient reactor will turn CO2 into largely carbonic acid. A diffuser will turn CO2 into mist and carbonic acid, and the proportion depends on the type of diffuser. Mist are nano bubbles that you can see. Free gas can be microscopic in size that you can't see, which is in equilibrium balance with carbonic acid according to pH, kH and temperature solubility law.

    If you measure pH with pH pen, it measures H+ ions so it detects only carbonic acid. If you measure pH with a liquid indicator, it's a chemical reaction that measures both carbonic acid and free gas because you cap and shake the water sample in a test tube. So if you have lot of CO2 mist, liquid indicator will show lower pH than pH pen.
     
  3. Milind Bokil

    Milind Bokil New Member

    Joined:
    Jul 11, 2018
    Messages:
    1
    Likes Received:
    0
    Local Time:
    12:01 AM
    Hi Am new to the forum and hobby …

    So which injection mode is better reactor or diffuser..
     
  4. FxFocus

    FxFocus New Member

    Joined:
    Aug 17, 2018
    Messages:
    9
    Likes Received:
    0
    Local Time:
    6:31 PM
    Many thanks for your response.
    Would have thanked you sooner but somehow missed the notification.
    Thanks again
    Ed
     
Loading...
Tags:

Share This Page

  1. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
    By continuing to use this site, you are consenting to our use of cookies.
    Dismiss Notice