Tetraplant Complete

Discussion in 'Substrates' started by thejesmonddingo, 18 Dec 2007.

  1. thejesmonddingo

    thejesmonddingo Newly Registered

    Messages:
    2
    I'm setting up a 10g tank,with this substrate,my tap water is ph 6.2 and very soft,I've put a couple of harlequins in to cycle it,but the ph and hardness are rising,I've covered the Tetraplant with Unipac Aqua Gravel,which I assumed was inert.Why is my ph and hardness increasing,is it the gravel.
    Ian
     
  2. Themuleous

    Themuleous Member

    Messages:
    4,126
    Location:
    Aston, Oxfordshire
    Could be the tetraplant substrate but Ive not heard of it rising the GH and there is no mention of it buffering the water on their website. Looks like its probably the gravel, which more than likely contains some form of lime, which will be increasing the hardness.

    Sam
     
  3. Garuf

    Garuf Member

    Messages:
    4,959
    Location:
    Leeds.
    I'm most likely wrong but could it possibly be co2 being given up?
     
  4. Themuleous

    Themuleous Member

    Messages:
    4,126
    Location:
    Aston, Oxfordshire
    CO2 shouldn't affect the water chemistry, well not that way anyway. If anything CO2 reduces KH a bit but it takes a fair while.

    Sam
     
  5. thejesmonddingo

    thejesmonddingo Newly Registered

    Messages:
    2
    I've tried putting vinegar on the gravel,with no obvious effect,but I can't think of another explanation.
    ian
     
  6. Ed Seeley

    Ed Seeley Member

    Messages:
    3,262
    Location:
    Nottingham
    I've got Tetraplant Complete in my cube and the stuff I've got certainly doesn't raise the hardness that I've noticed. Using RO water, DIY CO2 and inert sand the pH is around 5.8 - 6 all the time. Last time I measured it TDS was down to 80 as I've cut back the ferts for a while!

    If there is only a trace of calcerous material in the gravel vinegar may not be strong enough to see any fizzing. Try soaking some of it in RO or distilled water and test the GH, KH and maybe the pH after a few days to see what differences there are.
     
  7. beeky

    beeky Member

    Messages:
    879
    Location:
    Chippenham, Wiltshire
    I agree with ed. Vinegar is always mentioned for testing gravel and rocks but is seldom strong enough to show up anything. Try using kettle/bathroom descaler on it, that should show it!
     
  8. Themuleous

    Themuleous Member

    Messages:
    4,126
    Location:
    Aston, Oxfordshire
    Thats an interesting idea Beeky, does lime fizzle whet you add de-limescale to it?

    Worth remembering that one

    Sam
     
  9. Dave Spencer

    Dave Spencer Member

    Messages:
    1,389
    Location:
    N. Wales
    If you have a nitrate test kit that contains two reagent bottles, I believe the second bottle is Nitric acid.

    Dave.
     

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