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What's my real CO2 ?

Discussion in 'Advanced Strategies and Fertilization' started by reiverix, Sep 17, 2005.

  1. reiverix

    reiverix Lifetime Members
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    Water straight from tap - pH7
    Tap water after 24 hours - pH7.4 (the water company adds CO2)

    Tank water after CO2 injection - pH6.5
    Tank water after 24 hours - pH6.9

    My KH is 4 so I should have CO2 at around 34ppm. But my tank water has a lower pH than from the tap, I'm assuming because I have two largish pieces of driftwood. So how do I measure CO2, taking into account the fact that the wood is lowering my pH?
     
  2. Spar

    Spar Guru Class Expert

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    Re: What's my real CO2 ?

    is the tanic release from the wood just lowering your pH or can you tell if a decrease of KH is occuring?
     
  3. defdac

    defdac Lifetime Members
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    Re: What's my real CO2 ?

    An easy way is to breath down a small cup of aquarium water for about 5 minutes with a straw (don't pass out ;) and measure the pH. The color you recieve from the pH-test is the color you should shoot for.

    If the plants doesn't pearl with that pH, adjust you bubbel-rate up until fish gasps, then turn down just a notch.
     
  4. reiverix

    reiverix Lifetime Members
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    Re: What's my real CO2 ?

    I did not know that. Sounds like fun so I'll give it a go :) The reason I was asking is one of the wood pieces is quite new and some BBA started forming on it. My plants pearl fine but I can't help thinking my CO2 is lower than what seems. I killed off the BBA by spot treating it with Excel and it hasn't grown back but some staghorn is starting grow on my bolbitis.
     
  5. stcyrwm@adelphia.net

    stcyrwm@adelphia.net Prolific Poster

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    Re: What's my real CO2 ?

    How did you spot treat with Excel??????
     
  6. reiverix

    reiverix Lifetime Members
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    Re: What's my real CO2 ?

    I used a 5ml babies ear dropper from Wal-Mart. Slowly shoot it at the algae. All it takes is enough to make sure the BBA gets exposed so I was careful not to overdose. I limited myself to a max of 10ml a day in a 75g and after a few days the algae was red and dying. My ammano shrimp took a liking to it at this stage and polished it off.

    I've also turned up my CO2 a notch and so far so good. I removed the staghorn but had to sacrifice a few of my older bolbitis leaves, which really sucks as some of them were quite big and took an age to grow.
     
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