CO2 Advice needed

Discussion in 'Planted Tank Equipment' started by darryn, Jun 23, 2014.

  1. darryn
    Offline

    darryn Algae harvester

    • APSA Member
    53%
    Joined:
    Apr 27, 2009
    Messages:
    335
    Likes Received:
    5
    Trophy Points:
    28
    Location:
    Durbanville, Cape Town
    Hi All,

    I have recently moved and have set up my tank again.
    This setup was running before, but I never really got to dosing properly.
    Firstlly, what I currently have running:

    Specs:
    2 ft tank
    Tetratec EX700 cannister filter (700 l/h)
    50W heater (set to about 23 degrees C)
    ADA Aquasoil
    Dual Odyssea T5 lighting unit (total 48W)
    Photo period currently set at 4 hours per day. I will be upping this by 1 hour every 2 weeks.
    Dosing as per @wolf method (http://www.apsa.co.za/xenforo/threads/wolf-ei.11501/) adapted for 60L.
    Doing 50% water change per week.
    The tank is (currently) lightly planted.

    The tank has been up an running for just over a week now.

    I have recently acquired (but not installed) a 2L CO2 cylinder, single stage dual guage regulator and a 3-in-1 diffuser.
    Should I go ahead and install the CO2 now, or should I wait for the tank to 'mature' for a while before making the jump?
    Would my lighting be sufficient for CO2, or should I look at upgrading that before starting?
    Is there anything else that I should be considering before running CO2?

    TIA
     
  2. Slagter
    Offline

    Slagter Aquascaper

    • APSA Member
    • Sponsor
    73%
    Joined:
    Jan 29, 2008
    Messages:
    5,988
    Likes Received:
    915
    Trophy Points:
    173
    Location:
    Joburg
    Do it now. While the plants are still alive.

    All CO2 addition is better than no CO2 injection. Regardless of light. Get the balance of CO2 and ferts right, before you even consider lighting.
     
    Luis Embalo likes this.
  3. darryn
    Offline

    darryn Algae harvester

    • APSA Member
    53%
    Joined:
    Apr 27, 2009
    Messages:
    335
    Likes Received:
    5
    Trophy Points:
    28
    Location:
    Durbanville, Cape Town
    Thanks for the reply @Slagter

    How many bubbles per second do you think I should start with?
    For how long should the CO2 be running per day? From what i have read, start 30 min before lights on, and off 30 min before lights off.
    Does this sound about right?
    I have never run CO2 before, so any advice will be helpfull. :scratch:

    TIA
     
  4. JP01
    Offline

    JP01 Moderator Staff Member

    • Global moderator
    73%
    Joined:
    Jan 6, 2012
    Messages:
    6,091
    Likes Received:
    559
    Trophy Points:
    173
    Location:
    Benoni
    Start slow 1 - 2bps and watch your fish only do adjustments when you are there to check the fish.

    on same timer as your lights
     
    Luis Embalo likes this.
  5. darryn
    Offline

    darryn Algae harvester

    • APSA Member
    53%
    Joined:
    Apr 27, 2009
    Messages:
    335
    Likes Received:
    5
    Trophy Points:
    28
    Location:
    Durbanville, Cape Town
    Well, I took the plunge and started running CO2 tonight.
    I am currently running about 1 BPS on the same timer as my lights.
    Where would be the best place to put the diffuser?
    It is currently on the right side of the tank, opposite the spray bar (which is on the left).
    Is there a better position for it (maybe under the spray bar)?
    I assume that I should try and put the diffuser as low in the tank as I can so that the bubbles have the maximum contact time with the water?

    Plenty more questions to come. :scratch:
     
  6. darryn
    Offline

    darryn Algae harvester

    • APSA Member
    53%
    Joined:
    Apr 27, 2009
    Messages:
    335
    Likes Received:
    5
    Trophy Points:
    28
    Location:
    Durbanville, Cape Town
    Another question:
    How long after the solenoid is switched off does the diffuser stop releasing CO2?
    My solenoid switched off about 20 minutes ago, and I still see bubbles moving through my bubble counter.
     
  7. R.C.
    Offline

    R.C. Moderator Staff Member

    • Global moderator
    23%
    Joined:
    Jul 4, 2006
    Messages:
    4,399
    Likes Received:
    706
    Trophy Points:
    123
    Location:
    Cape Town
    That's normal as there's still CO2 in the tubing and bubble counter.
     
    Luis Embalo likes this.
  8. JP01
    Offline

    JP01 Moderator Staff Member

    • Global moderator
    73%
    Joined:
    Jan 6, 2012
    Messages:
    6,091
    Likes Received:
    559
    Trophy Points:
    173
    Location:
    Benoni
    Bubbles at the bubble counter should stop, there is however still pressure in the system and you will still get CO2 at the diffuser.

    Place the diffuser underneath the spray bar so the outflow moves the CO2 around.
     
    Luis Embalo likes this.
  9. R.C.
    Offline

    R.C. Moderator Staff Member

    • Global moderator
    23%
    Joined:
    Jul 4, 2006
    Messages:
    4,399
    Likes Received:
    706
    Trophy Points:
    123
    Location:
    Cape Town
    How far up the line is your bubble counter or is it on reg. If the latter, then you may have a problem.

     
  10. darryn
    Offline

    darryn Algae harvester

    • APSA Member
    53%
    Joined:
    Apr 27, 2009
    Messages:
    335
    Likes Received:
    5
    Trophy Points:
    28
    Location:
    Durbanville, Cape Town
    Thank you for all the replies.

    My diffuser is a 3-in-1 (diffuser, check valve, bubble counter all in one).

    This is what I tested:
    By this morning at about 05:45, I was still getting bubbles going through the bubble counter, even though the solenoid was 'off'.
    I disconnected the tubing at the needle valve. I did feel that pressure was released when the tubing was removed.
    The bubbles stopped.
    I reconnected the tubing and after a few minutes there were again bubbles in the bubble counter.
    I disconnected the tubing at the needle valve again. Once again it felt like pressure was released when the tubing was removed.
    From the above it seems like the solenoid is not closing properly when power is removed, so it seems I have a faulty solenoid.
    Is my assumption correct? Is there anything else that I should try test?

    TIA

    PS: I have just left the tubing disconnected so long. I don't want to be running CO2 24/7.
     
  11. JP01
    Offline

    JP01 Moderator Staff Member

    • Global moderator
    73%
    Joined:
    Jan 6, 2012
    Messages:
    6,091
    Likes Received:
    559
    Trophy Points:
    173
    Location:
    Benoni
    Yes you are correct, if you released the pressure in the line and there was pressure again then there is a leak past your solenoid.
     
  12. wolf
    Offline

    wolf Valued Contributor

    • APSA Member
    77%
    Joined:
    Feb 15, 2009
    Messages:
    2,703
    Likes Received:
    411
    Trophy Points:
    93
    Location:
    cape town table view
    there can be a leak in the solenoid that its not sealing 100%
     
    Luis Embalo likes this.
  13. R.C.
    Offline

    R.C. Moderator Staff Member

    • Global moderator
    23%
    Joined:
    Jul 4, 2006
    Messages:
    4,399
    Likes Received:
    706
    Trophy Points:
    123
    Location:
    Cape Town
    What reg you have. Can you hear your solenoid clicking on/off?
     
  14. darryn
    Offline

    darryn Algae harvester

    • APSA Member
    53%
    Joined:
    Apr 27, 2009
    Messages:
    335
    Likes Received:
    5
    Trophy Points:
    28
    Location:
    Durbanville, Cape Town
    @R.C.
    I don't know the name, but attached is a pic of it. I believe that Sarie supplies these types.
    I have not actually heard it clicking... I did not know that it was supposed to.... LOL
    I will only be able to check that tonight.
     

    Attached Files:

  15. R.C.
    Offline

    R.C. Moderator Staff Member

    • Global moderator
    23%
    Joined:
    Jul 4, 2006
    Messages:
    4,399
    Likes Received:
    706
    Trophy Points:
    123
    Location:
    Cape Town
    It's likely stuck open, in which case I'd just return it if still under warranty.
     
    Luis Embalo likes this.
  16. darryn
    Offline

    darryn Algae harvester

    • APSA Member
    53%
    Joined:
    Apr 27, 2009
    Messages:
    335
    Likes Received:
    5
    Trophy Points:
    28
    Location:
    Durbanville, Cape Town
    Thanks @R.C.
    I appreciate everyone's input.
    I will see what my warranty options are.

    Just out of interest, with these regulators, can just the solenoid be replaced?
     
  17. shihr
    Offline

    shihr Administrator Staff Member

    • Super Admin
    23%
    Joined:
    Oct 25, 2007
    Messages:
    8,863
    Likes Received:
    1,786
    Trophy Points:
    223
    Location:
    Edenvale
    yes it can be replaced.. take it back and hopefully they give you a new one..
     
  18. darryn
    Offline

    darryn Algae harvester

    • APSA Member
    53%
    Joined:
    Apr 27, 2009
    Messages:
    335
    Likes Received:
    5
    Trophy Points:
    28
    Location:
    Durbanville, Cape Town
    Thanks @shihr

    I will try and see what the supplier says first and then look at the options.
     
  19. wolf
    Offline

    wolf Valued Contributor

    • APSA Member
    77%
    Joined:
    Feb 15, 2009
    Messages:
    2,703
    Likes Received:
    411
    Trophy Points:
    93
    Location:
    cape town table view
    Think it is the magnet part that went if u donot here any thing klikking
     
  20. Luis Embalo
    Offline

    Luis Embalo Valued Contributor

    • APSA Member
    23%
    Joined:
    Feb 11, 2010
    Messages:
    5,342
    Likes Received:
    1,184
    Trophy Points:
    223
    Location:
    Elsies River - Cape Town
    If under warranty take it back.. for solenoids not under warranty, just take it apart and clean, there is a rubber that gets dirty often.

    The issue is normally with the cylinders, they are dirty so when you connect the regulator the dirt gets into the devices.

    I always let a bit of CO2 off, before connecting it.. just to get rig of any gunk that may be in the pipes.
     

Share This Page