Achieving 30ppm - do I dare turn up the gas?

Discussion in 'Carbon Dioxide (CO2)' started by joeinlondon, 16 Oct 2008.

  1. joeinlondon

    joeinlondon Member

    Messages:
    31
    My life (and my fishes') with pressurized CO2 is now about five days old, and I still have yet to see the hallowed lime green drop checker, so am seeking advice on my next step.

    I started off with the diffuser beneath the internal power filter (rated at 500lph), but this caused a lot of filter burping, a lot of bubbles of different sizes, and only achieved a blue-green on the drop-checker.

    Seeing as the tank is small (67L) I have now moved the diffuser to the opposite end of the tank, where the outflow from the filter, as Richard from AE elegantly put it, catches the bubbles 'like a bird in a thermal'. You will see from the picture below how the bubbles are held down by the current:
    Diffuser2.jpg

    But still, drop checker only gets to blue-green, its greenest being at the end of the day (I think).

    Currently the bubble rate on the D&D system is over 1 bubble/sec, but I am wondering if I need to increase this?

    Here is the positioning of the drop-checker in relation to the diffuser (note the blue-blue-green colour that I see in the morning, despite the gas coming on 45 mins before lights on):
    Dropcheckerpositioning.jpg

    And finally for you flow-nuts out there here is a picture showing the tetras hanging in the current that will hopefully take the CO2 laden water back to the other end of the tank:
    Tetrasinflow.jpg

    Is it time to turn up the gas? Any help as ever will be much appreciated.

    Thanks

    Joe
     
  2. Steve Smith

    Steve Smith Member

    Messages:
    4,428
    Location:
    Leamington Spa, UK.
    I would say up the CO2. Try 2bps and see how you get on. Your fish will soon tell you if theres a problem. The drop checker should respond within a few hours. If it doesn't it might be worth replacing the solution.
     
  3. Joecoral

    Joecoral Member

    Messages:
    694
    Location:
    Neath, South Wales
    are you definately using 4dkh solution (not tap/tank water) in the checker?
     
  4. joeinlondon

    joeinlondon Member

    Messages:
    31
    Definitely - got it from AE. It does change colour, just not very much.

    S Chong was using 2bs for his high-light tank (which mine is not). Do you think it's safe to go that high?
     
  5. Steve Smith

    Steve Smith Member

    Messages:
    4,428
    Location:
    Leamington Spa, UK.
    Bare in mind that every tank is different. What works for one might not work for another. You've got to go by what your drop checker is telling you, and your plants and fish :)

    Also, are you sure you haven't got any leaks anywhere? Do you get a good mist of CO2 or just a few bubbles/large bubbles? I have a Rhinox 5000 which is absolute rubbish. The ceramic is poor quality on the one I have (not all, rhinox are generally good). It produces a partial mist and a lot of less mist like bubbles. I had to drive it harder to get good CO2. I've changed it for something else now.
     
  6. I am currently using 1 bps on my 40cm. Have previously had it at 2 bps for "At Forest's Gate". Turn it up a bit and see how you get on

    Tom
     
  7. LondonDragon

    LondonDragon Administrator Staff Member

    Messages:
    10,272
    Location:
    London
    Bubble rate also depends on the bubble checker, mine is so fast I can't even count them LOL
    So bubble rate is not a good measure, just pump it a little everyday until you get the right amount, took me about a week of adjustments to get it right.
     
  8. joeinlondon

    joeinlondon Member

    Messages:
    31
    Ach you see I don't trust the drop-checker, thinking I must have set it up wrong, but I will creep it up a bit. Diffuser seems to be working okay - mix of mist and tiny bubbles.

    Okay, I'll crank her up a tiny bit tonight, see what things are like at lights off.

    Patience needed as ever.

    Thanks for your responses!

    Joe
     
  9. LondonDragon

    LondonDragon Administrator Staff Member

    Messages:
    10,272
    Location:
    London
    If after an increase you notice the fish gasping for air at the surface, just move it back down to the previous level and leave it at that. Running an air pump during the night like I do would also give the fish a break ;)
     
  10. Fred Dulley

    Fred Dulley Member

    Messages:
    512
    Location:
    Cardiff, Wales
    As well as gasping, fish acting "drunk" is a sign of CO2 overdose. :)
     

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