CO2 when to turn it on? (NOW GENERAL CO2 QUESTIONS)

Discussion in 'Carbon Dioxide (CO2)' started by col748, 12 Feb 2008.

  1. col748

    col748 Newly Registered

    Messages:
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    Location:
    Manchester
    I run my lights 5 hours on 2 off 5 on as i was told this is good method to stop algae.

    Should i put my CO2 cut off switch thingy on the same timer as the lights so it turns on and off with the lights?
     
  2. ceg4048

    ceg4048 Expert/Global Moderator Staff Member

    Messages:
    8,951
    Location:
    Chicago, USA
    Hi,
    As far as I have been able to determine turning lights on and off does absolutely nothing to prevent or reduce algae, and in fact, it may actually do just the opposite. Algae respond much more quickly to short term changes in the environment.

    I would suggest you leave your lights on for the duration of the photoperiod and perhaps only vary the intensity during the day by first some lights for a few hours, all for a few more and then the reverse near the end of the day.

    Plants do best if the optimum level of CO2 is available as soon as the lights go on and in the afternoon they start to reduce their uptake. You can accomplish this by turning on the gas an hour or so before lights on and turning off the gas a few hours before lights off. This reduces your gas consumption, allows you to drive the CO2 levels to slightly higher values and it also gives your fish a break.

    Cheers,
     
  3. Themuleous

    Themuleous Member

    Messages:
    4,126
    Location:
    Aston, Oxfordshire
    Yeh turn the CO2 on around an hr before the lights come on.

    Sam
     
  4. col748

    col748 Newly Registered

    Messages:
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    Location:
    Manchester
    Ok thanks guys i'll give it a try.

    I haven't started to use CO2 yet but my PH level is always 6.5, am i right in saying when i start to use CO2 it will lower my PH level even more?
     
  5. Ray

    Ray Member

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    474
    Location:
    Switzerland
    Yes it will. However, the chemistry behind it is such that it does not seem to bother fish - they can easily adapt to CO2 induced PH changes.
     
  6. col748

    col748 Newly Registered

    Messages:
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    Location:
    Manchester
    Ok i've started to use CO2, but the diffuser thing doesn't seem to work right. i have the JBL easy 2, the bubbles just gather in the top of diffuser and eventually come out the top in one big bubble is this right?

    Also does anyone one know this kit, it says start with a bubble in every other bend, does this mean every other level in diffuser cos that sounds alot?
     
  7. Themuleous

    Themuleous Member

    Messages:
    4,126
    Location:
    Aston, Oxfordshire
    If it were me Id ditch the supplied diffuser its ulgy and inefficnent IMHO. Get a glass diffuser and bubble counter, actually you dont never need a bubble counter.

    http://www.aquaessentials.co.uk/index.p ... th=196_197

    Then use a ph drop checker with 4dKH to check the levels :)

    Sam
     
  8. col748

    col748 Newly Registered

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    Location:
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    How do you know if you are putting in to much CO2 by checking the PH and dKH?
     
  9. Themuleous

    Themuleous Member

    Messages:
    4,126
    Location:
    Aston, Oxfordshire
  10. col748

    col748 Newly Registered

    Messages:
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    Location:
    Manchester
    Ouch my head hurts!!! Its going to take a few reads to get it clear in my head. Great post tho thanks for link.
     
  11. col748

    col748 Newly Registered

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    Location:
    Manchester
    Silly question time............whats PPM? :oops:
     
  12. ceg4048

    ceg4048 Expert/Global Moderator Staff Member

    Messages:
    8,951
    Location:
    Chicago, USA
    Hi mate, the only silly question is the one gone unasked :D

    PPM is a measure of concentration and means Parts per Million. so that one kilogram of salt dissolved in 1 million liters of water is 1 ppm. 1 liter of water weighs 1 kilogram so the weights are apples to apples.

    A million liters is a lot so lets divide everything by 1 million:

    1000grams/1,000,000= 1miligram salt
    1,000,000 liters/1,000,000= 1 liter water = 1 kilogram of water.

    So , 1 mg of salt dissolved in 1 liter (1 kg) of water is also 1 ppm.

    Hope this makes sense.:rolleyes:

    Cheers,
     
  13. col748

    col748 Newly Registered

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    10
    Location:
    Manchester
    Thats great thanks i was thinking it was somethiing to do with bubble rate.......something like P? PER MIN :lol:
     

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