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Co2 and water changes

Discussion in 'Are you new to aquatic plants? Start here' started by Relic, Jun 15, 2009.

  1. Relic

    Relic Junior Poster

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    I've been keeping small 5 gallon planted tanks for a while using EI but I think I'm ready for a larger tank and Co2 injection.

    So I have a bit of a novice question; My tap water pH is between 8.4 and 8.6, what kind of water would you folks recommend for water changes while I am injecting Co2? Should I be mixing distilled water with tap water? Use RO water or just add straight from tap to tank? I want to achieve a stable pH of 7.0. I plan on keeping a tank that is at least 30 gallons.

    THx
     
  2. Philosophos

    Philosophos Lifetime Charter Member
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    Worry about your KH more than pH. You can always cut your tap with RO water if it's too hard. ADA aquasoil can do some nice buffering things as well from what I understand, though I lack direct experience with it.

    -Philosophos
     
  3. Relic

    Relic Junior Poster

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    The KH of my tap water is 4dH (dropped down from 6dH since last year).
    I'll consider installing a RO unit for my tap. Thanks
     
  4. Tom Barr

    Tom Barr Founder
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    KH of 4 to 6 degrees sounds ideal really.

    No need for an RO.

    Regards,
    Tom Barr
     
  5. VaughnH

    VaughnH Lifetime Charter Member
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    It seems that some water supply companies add far more than seems necessary of a chemical to raise the pH well above 7. I suspect that is why some people report relatively low KH, but very high GH and pH. The only question I have is whether the substance being added is detrimental to plants or fish - is it soda ash?
     
  6. abcemorse

    abcemorse Prolific Poster

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    My tap water pH is close to 8, midday tank pH close to 6 and I do nothing special, drain it, prune if necessary, clean filters if necessary, fill it. Maybe I'm just lucky, we have good water in the northwest, but no issues.
     
  7. shoggoth43

    shoggoth43 Lifetime Charter Member
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    Well...

    MWRA - FAQs about Drinking Water

    This is what I'm dealing with. No hardness to speak of but def. high pH to protect the pipes and keep from leaching lead ( or so I'm told, hopefully it works ). I have no idea what they're using. My guess is that many of the water companies do something similar.

    -
    S
     
  8. VaughnH

    VaughnH Lifetime Charter Member
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    No GH hardness, but I'll bet the water has a high KH. That water system really does have a high pH too. Man is a very adaptable creature, able to drink water with a widely varying set of parameters:p
     
  9. Relic

    Relic Junior Poster

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    Thanks for the interesting discussion, and yes, I will hold off on the RO water:)
     
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