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

Oxygen, CO2 balance!

Discussion in 'CO2 Enrichment' started by Gbark, Jun 7, 2010.

  1. Gbark

    Gbark Guru Class Expert

    Joined:
    Jun 15, 2009
    Messages:
    266
    Likes Received:
    1
    Local Time:
    9:56 AM
    Hi,

    I have been running my tank for two years now, and i have never seen my plants pearl.

    I have a KH of 140mg/l and a pH of 6.2-6.8 (lights on and lights off)

    I use an external filter and lilly pipes with my DIY CO2 reactor.

    I generate surface movement with a koralia wave maker.

    My question is, Should i satuate water with O2 by adding a air pump or powerhead and add more CO2 to compansate or is it ok left how it is? ;)
     
  2. mi5haha

    mi5haha Prolific Poster

    Joined:
    Oct 12, 2008
    Messages:
    54
    Likes Received:
    0
    Local Time:
    9:56 AM
    for diy Co2, turbulant water surface may have shaked it out minutes after you inject Co2.
     
  3. Gbark

    Gbark Guru Class Expert

    Joined:
    Jun 15, 2009
    Messages:
    266
    Likes Received:
    1
    Local Time:
    9:56 AM
    sorry i was unclear, i use pressureised CO2, but i have a DIY inline CO2 reactor. (see my blog;))
     
  4. pat w

    pat w Member

    Joined:
    Nov 4, 2009
    Messages:
    462
    Likes Received:
    0
    Local Time:
    9:56 AM
    Noob opinion : take with a grain o' salt ...

    I'd be more inclined to re-check CO2, and look at dosing and light (both power and period).

    I just came out of my dry start. I have been running with 108 watts of T5HO for 8 Hrs/day, with 1/2 EI dosing per Tom's advice. I've been moving my DC around and seem to have a good CO2 situation. If you recall, from a previous responce of yours to one of my posts, I have an almost identical CO2 reactor. I consistantly see pearling on the polygonum but only on the leaves closest to the top of the tank.

    Even if you could manage to inject O2 to the point of saturation without adversly affecting CO2 (doubtfull IMO considering the potential for losses) it would still be an artificial solution to the issue; an issue which is probably not a problem assuming an otherwise healthy tank.

    Just a noob's opinion.
    Pat
     
  5. Gbark

    Gbark Guru Class Expert

    Joined:
    Jun 15, 2009
    Messages:
    266
    Likes Received:
    1
    Local Time:
    9:56 AM
    I'm not worried about seeing pearling. I read somewhere that you don't get pearling until the water reaches o2 satuation. And therefore i was wondering if i have enough o2 in my water?

    I gassed my fish once in about month 2 of starting this hobby, and lost a couple :(

    I also move my Drop Checkers around and i get a very yellow colour where the oulet of my filter/reactor enter, and a lime green colour on other side of tank.:eek:
     
  6. mi5haha

    mi5haha Prolific Poster

    Joined:
    Oct 12, 2008
    Messages:
    54
    Likes Received:
    0
    Local Time:
    9:56 AM
    if you keep some water movement under the water surface (judging the bulb reflections on the water surface, they shall not be much influenced), if you are also running a skimmer to keep water surface clear, there should be no much problem for fish so long as you do not inject Co2 too much.
     
  7. pat w

    pat w Member

    Joined:
    Nov 4, 2009
    Messages:
    462
    Likes Received:
    0
    Local Time:
    9:56 AM
    Ok, I misunderstood the reason for your concern. Assuming a good reference solution in your DC, the CO2 shouldn’t be an issue. However, more flow and better distribution would probably help. The next questions are:

    Total bio mass in the tank? – too little and I wouldn’t expect it could push O2 to saturation no matter what you did.

    Dosing?

    Light?

    Later,
    Pat
     
  8. Gbark

    Gbark Guru Class Expert

    Joined:
    Jun 15, 2009
    Messages:
    266
    Likes Received:
    1
    Local Time:
    9:56 AM
    I have noticed as the day draws to an end and the co2 is about to switch off for the night, my fish and critters become slow and struggle to breath, they go to the bottom of the tank.

    At this time i have a pH of 6.0 maybe 5.9, i can't add anymore co2 or i would gas the fish. I have a bubble rate that i can't even count.

    Could i add oxygen as well, or would this affect my co2 ppm?
     
  9. dutchy

    dutchy Plant Guru Team
    Lifetime Member

    Joined:
    Jul 6, 2009
    Messages:
    2,280
    Likes Received:
    1
    Local Time:
    9:56 AM
    Hi Gbark,

    You could add oxygen as well, but normally this is accomplished by having enough surface movement. Adding O2 will not affect CO2, but it will allow you to use more CO2. Less O2 restricts use of CO2. But, why don't you just try to slow down CO2 just a tad? That doesn't have to mean you have an algae bloom tomorrow ;). I don't know how high your water temp is, but less water temp means more O2. maybe you can gain something here. If you are that high with CO2 by the time the lights switch off, you could also think about switching CO2 off earlier, so that pH rises a little bit towards the "lights off" period. CO2 demand is much lower at the end or the day.

    regards,
    dutchy
     
  10. Gbark

    Gbark Guru Class Expert

    Joined:
    Jun 15, 2009
    Messages:
    266
    Likes Received:
    1
    Local Time:
    9:56 AM
    Hi

    Thanks, i think i will back it off a touch, i haven't seen any algae for about 1 year now. I also run the tank at 26 degC, i could drop this to 25 degC
     
Loading...

Share This Page