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

venturi on external CO2 reactor

Discussion in 'General Plant Topics' started by sllo, Oct 4, 2005.

  1. sllo

    sllo Junior Poster

    Joined:
    Jan 24, 2005
    Messages:
    14
    Likes Received:
    0
    Local Time:
    11:26 AM
    Hello guys,

    I am new to this forum, I just joined yesterday. I went through reading all the posts regarding the venturi CO2 reactor but I don’t really know where to insert the venturi tube on my DIY external CO2 reactor.

    Bellow is a schematic of the reactor I currently use. It is 24" long and 1-1/2" wide. Although It is quite long there are still tiny bubbles escaping from the reactor into the aquarium. I used to have a 2" wide and 18" long but the gas built up was way too much beacuse my fluval output flow is not strong enough, howere I used to have bubbles escape from that reactor as well.


    The gas built up in the reactor is shown in the schematic. At which place should the venturi tube be inserted, 1, 2, 3 or somewhere else?
     
  2. Tom Barr

    Tom Barr Founder
    Staff Member Administrator

    Joined:
    Jan 23, 2005
    Messages:
    18,660
    Likes Received:
    600
    Local Time:
    11:26 AM
    Re: venturi on external CO2 reactor

    Add the venturi line lower, about 1/2 way down on the tube there.

    Regards,
    Tom Barr
     
  3. phineus

    phineus Junior Poster

    Joined:
    Jan 23, 2005
    Messages:
    11
    Likes Received:
    0
    Local Time:
    11:26 AM
    Re: venturi on external CO2 reactor

    Tom,
    In a recent post on APD you mentioned using the venturi power skimmer for CO2, can you provide details?
     
  4. Tom Barr

    Tom Barr Founder
    Staff Member Administrator

    Joined:
    Jan 23, 2005
    Messages:
    18,660
    Likes Received:
    600
    Local Time:
    11:26 AM
    Re: venturi on external CO2 reactor

    Not the skimmer, the venturi valve attachment that is providing the bubbles to a skimmer, you remove this and add that tio the tank, not to a skimmer cup etc.

    Regards,
    Tom Barr
     
  5. bonklers

    bonklers Junior Poster

    Joined:
    Jan 29, 2005
    Messages:
    9
    Likes Received:
    0
    Local Time:
    11:26 AM
    Re: venturi on external CO2 reactor

    @silo, why do you have three lines going to the spraybar? I understand number 3 is the venturi loop, but what's the numbers 1 and 2 for? Won't they make your reactor less efficient because you're leaving no time to have the CO2 react with the water?

    Tom, if I understand correctly the venturi loop is to burp out the gas buildup. So in this picture line 3 (where it should be on 1/2 of the reactor) will be connected to the outlet of the reactor. Why should it be that far away from the gas buildup "zone"? In my experience the gas buildup doesnt even come on 1/3 of the reactor from above. This way it'll loose it's function since it the venturi loop never reaches the gas buildup zone.

    I also wonder what'll happen if you connect the venturi loop to the inlet of the reactor instead to the outlet. This way you can give the CO2 gas a second chance to diffuse in the reactor. Has anyone tried this before? In this case I was thinking connecting line 2 with the reactor inlet.
     
  6. sllo

    sllo Junior Poster

    Joined:
    Jan 24, 2005
    Messages:
    14
    Likes Received:
    0
    Local Time:
    11:26 AM
    Re: venturi on external CO2 reactor

    the 3 numbered lines are just the options I draw in order to ask where to insert the venturi loop.

    I have the exact same question.
    I inserted the venturi loop 1/2 the way of the reactor tube and as I noticed the built up zone of the gas is way up from the venturi.
     
  7. Tom Barr

    Tom Barr Founder
    Staff Member Administrator

    Joined:
    Jan 23, 2005
    Messages:
    18,660
    Likes Received:
    600
    Local Time:
    11:26 AM
    Re: venturi on external CO2 reactor

    On an internal reactor the venturi is roughly 2" down from the top, the burp hole is roughly 2.5" from the top. This means about 2" build up is required before you see the venturi action.... and about 2.75-3" before you get a burp due to water tension rather than 2.5" inches.

    Regards,
    Tom Barr
     
Loading...

Share This Page