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RO Waste Water

Discussion in 'Advanced Strategies and Fertilization' started by reiverix, Dec 1, 2005.

  1. reiverix

    reiverix Lifetime Members
    Lifetime Member

    Jan 29, 2005
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    1:09 AM
    I recently set up an RO unit for my reef tank but I dislike the fact that about three quarters of the water comes out as waste. I was thinking about using this waste water for my water changes on my planted tanks. In Columbus the tapwater is devoid of most things except phosphate. I tested the waste water for a few things and here's the result.

    PO4 2.5 - 3ppm
    KH 2.5
    GH 8
    NO3 20 - 30ppm

    There's usually no nitrates in our tapwater but recently there was a large spike which seems to be going down slowly. Our water supplier strips out a lot of elements such as iron, copper, calcium, magnesium, etc.

    Should I chance it?
  2. Vladimir Zhurov

    Vladimir Zhurov Lifetime Members
    Lifetime Member

    Aug 25, 2006
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    1:09 AM
    Re: RO Waste Water

    Looks like a pretty fine water after everything was dosed in "EI for high-light tank" ammounts.

    My personal concern would not be nutrients but that something potentially toxic has increased its concentration. But if you say that volume decrease is only 25% (25% goes to pure H2O and the rest is accumulated in remaining 75% of mineralized water) than concentration will grow only by 1/3.

    I would give it a try on some test tank.



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