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

Lighting distance and co2 timer question.

Discussion in 'Talk to Tom Barr' started by Vinno, Apr 22, 2010.

  1. Vinno

    Vinno Junior Poster

    Joined:
    Apr 11, 2010
    Messages:
    10
    Likes Received:
    0
    Local Time:
    9:23 PM
    Light position, how high can i put T5 lighting above waterline?

    From lowest gravel point to water line is 43cm/430mm/16.9291339 inches

    How high can my lighting be above the waterline before it starts to loses effectiveness from the gravel mark, growing hc/jap hairgrass for carpet.



    Also, I have brought two timers for the tank.
    Light: Starts at 3pm, turns off at 10pm every day.
    Co2: Starts at 1pm, turns off at 10pm every day.

    Is two hours enough time to pump the co2 to the max before the lights turn on?
     
  2. dutchy

    dutchy Plant Guru Team
    Lifetime Member

    Joined:
    Jul 6, 2009
    Messages:
    2,280
    Likes Received:
    2
    Local Time:
    9:23 PM
    Basically you need around 40 micromol on the substrate. You can find a nice graph here: http://www.barrreport.com/showthread.php/6036-Massaged-PAR-Data-for-T5HO-lights?

    In my tank the distance lights/substrate is 22 inch and I have no problem growing HC.

    Starting to add CO2 two hours before should be enough, and is even a bit slow. Your CO2 system should be so good that only one hour is enough. A system with a lot of lag (low response) can cause problems. You can shut your CO2 off one hour before lights go off.

    Regards,
    dutchy
     
  3. Vinno

    Vinno Junior Poster

    Joined:
    Apr 11, 2010
    Messages:
    10
    Likes Received:
    0
    Local Time:
    9:23 PM
    I dont think my iq is high enough lol, tried reading that link twice.

    35gal tank with 6x24w = 4wpg. That would make it more intense right, how safely higher can i lift it?
     
  4. dutchy

    dutchy Plant Guru Team
    Lifetime Member

    Joined:
    Jul 6, 2009
    Messages:
    2,280
    Likes Received:
    2
    Local Time:
    9:23 PM
    That's a LOT of light!! I would suggest you go down to 2 x 24 Watt with a set of good reflectors. That will give you all the light you need. Even then you might need to raise it like 12 inch above the substrate. According to the graph a SINGLE T5 tube with good reflector reaches it's limit around 24 inch.

    regards,
    dutchy
     

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