drop checker colour

Discussion in 'Carbon Dioxide (CO2)' started by thewelshwonder, 8 Apr 2009.

  1. thewelshwonder

    thewelshwonder Member

    Messages:
    43
    hi guys should the colour in the drop checker change overnight when the ph rises?this is the colour in the checker this morning,i run co2 for 9 hours a day which is 1 hour before lights on and off 1 hour before the lights go off.
    P1000487.jpg
     
  2. Steve Smith

    Steve Smith Member

    Messages:
    4,428
    Location:
    Leamington Spa, UK.
    It should get darker as the level of CO2 drops, but bare in mind that plants "exhale" CO2 at night I believe. One of the more sciencey guys may be able to help you out more though :)
     
  3. vauxhallmark

    vauxhallmark Member

    Messages:
    569
    Mine doesn't really get much darker overnight - I don't have any surface agitation, so I think it stays quite stable. (CO2 goes off with a solenoid like yours). If the drop checker is exposed during a water change it goes dark dark blue in 10 minutes, so I know it's working. If your fish seem happy in the morning I wouldn't worry.

    Mark
     
  4. thewelshwonder

    thewelshwonder Member

    Messages:
    43
    the colour was dark blue when i did the water change on monday
     
  5. vauxhallmark

    vauxhallmark Member

    Messages:
    569
    Sounds fine. :D
     
  6. Themuleous

    Themuleous Member

    Messages:
    4,126
    Location:
    Aston, Oxfordshire
    Sorry you have probably been asked this before, but are you using the 4dKH water in that DC? If so then the colour you show looks about right to me :) I dont really notice a difference in the DC overnight, although I do run my CO2 24/7.

    Steve is also right is saying that plants do give off CO2 at night, but this is less than they take in during the day.

    Sam
     
  7. Dolly Sprint 16v

    Dolly Sprint 16v Member

    Messages:
    1,611
    Location:
    Cheshire
    Sam & Guys

    If you are using ph reagent and 4dkh solution you will not see a dramatic change of colour ie drop checker solution turning blue, more like a dark green but certainly not blue. My DC with the above solution does not turn blue - but my Red Sea does which has their solution + 1 ml of tank water.

    This begs the question how good / reliable is ph reagent and 4dkh

    Regards

    Paul.
     
  8. thewelshwonder

    thewelshwonder Member

    Messages:
    43
    mine turned blue using tank water as the tank ph is 7.6,ive just changed to 4dkh so i'll see if there's any difference using 4dkh to tank water
     
  9. jay

    jay Member

    Messages:
    693
    Location:
    Harrow, Middlesex
    That colour looks fine, mine is like that during light hours and yellow in the morning.
    As long as you have some nice surface movement and feeding the plants well enough for them to pearl and bring oxygen into the water, the fish will be fine.
     
  10. squiggley

    squiggley Member

    Messages:
    220
    Mine's the same and was going to ask a similar question

    Thanks
     

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