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. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.
  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

A new test?

Discussion in 'Advanced Strategies and Fertilization' started by cousinkenni, Apr 5, 2007.

  1. cousinkenni

    cousinkenni Prolific Poster

    Joined:
    May 18, 2005
    Messages:
    60
    Likes Received:
    0
    Local Time:
    6:19 PM
    Hi Tom and others,

    I did a search, but couldn't find the answer to this question. Maybe it has been talked about and I have just forgotten......

    What happens to plants when there is too much CO2 in the water? Say double to triple the recomended amount 60-90pm. With the advent of the 4/5dKH drop checker method we should be able to easily target these amounts.

    Have you done this experiment for an extened period Say 1-2 weeks? I remember reading several times that CO2 over 30ppm doesn't improve plant growth but will too much CO2 (lets say the ranges mentioned above) actually hinder plant growth/hurt the plants?

    For all intents and purpose lets make this a fish free tank so as to not upset animal lovers with the thought of killing the fish.

    Thanks for any insight,

    Ken T.
     
  2. Tom Barr

    Tom Barr Founder
    Staff Member Administrator

    Joined:
    Jan 23, 2005
    Messages:
    18,648
    Likes Received:
    556
    Local Time:
    6:19 PM
    If you remove the fish etc, then adding a lot more than 30ppm is not going to increase plant growth, even at high light levels, which can also reduce CO2 uptake if excessive(seldom the case for us, even with 1000w MH's: 800micromol vs 2000 (full sun).

    Some plants might do better etc but most should be fine.
    We generally add more till no new increase in growth rate is noted.
    You need non limiting conditions for the other parameters.

    I think you might be able to hinder plant growth at extremely levels, 500ppm etc.

    An interesting tidbit is the resistance to diffusion of CO2, this goes back to the CO2 mist issue.

    You can increase the CO2 delivery to a submersed plant without having to dissolve the CO2, leaving it instead in the gas phase where it can break through the leaf's boundary layer and supply higher concentrations rapidly to the plant.


    Regards,
    Tom Barr
     
Loading...

Share This Page