Sea Water Test

Discussion in 'Water Parameters and Additives' started by xtreme, 24 Feb 2011.

  1. xtreme

    xtreme

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    Hi all

    This morning I decided to test our sea water here in Swakopmund Namibia.

    Did the test with Salifert test kits
    Water Temp. and SG with a floating glass Thermometer.
    Our sea water normaly has a temp. from 14 and up to 18
    Floated the bottle in the aquarium for 30min with 250ml water in it.

    Temp 25
    SG 1.026

    pH 7.4
    KH 7
    Alk 2.51

    NH4 0
    NO2 0.01
    NO3 2.5
    PO4 0.25

    CA 410
    Mg 1230
    I2 0.01 (combined iodate and iodine test)

    So what info do you have to make this water usable for reef tank

    Thanks
     
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  3. Q89

    Q89

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    Going to tag along;)
     
  4. xtreme

    xtreme Thread Starter

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    Ok going to add

    Brightwell PO remover Liquid is awesome and it will remove the phosphate
    Then buffer with PH and KH to get that right. Allmixed up in a drum for a week before water change.

    What do you guys think?
     
  5. xtreme

    xtreme Thread Starter

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    bump
     
  6. xtreme

    xtreme Thread Starter

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    Got this from the web
    [​IMG]
     
  7. xtreme

    xtreme Thread Starter

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    bump
     
  8. Q89

    Q89

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    anyone with something?
     
  9. FransSny

    FransSny

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    Why 2 measures ?
     
  10. xtreme

    xtreme Thread Starter

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    lol Fraans, thats what the test kit show
     
  11. Alan

    Alan Admin MASA Contributor

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    I would use that water no problem, just lower the phosphate levels.
     
  12. xtreme

    xtreme Thread Starter

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    @Alan I am using NSW, tested that water near by the mole in swakop, now I'm collecting further out and test is spot on, water just cold, lol
     
    Last edited by a moderator: 26 Nov 2015
  13. FransSny

    FransSny

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    Just pulling your leg...same reading just different measurements (I saw you circled the Alk in the table)

    Here is a calc you can use :

    http://saltyzoo.com/SaltyCalcs/AlkConv.php

    @Alan...I completely agree...would use that water
     
    Last edited by a moderator: 26 Nov 2015
  14. Alan

    Alan Admin MASA Contributor

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    Bud i collect my water out of the rock pools.
     
  15. Achilles

    Achilles

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    Your ph reading is probably not accurate fresh sea water should be above 7.9 usually but also depends rock pools may have lower ph , also ph tests need to be done very quickly on the water if you let water sit for 30 minutes you will get a different ph reading.

    You are likely going to have to buffer and use phosphate remover( by itself removes kh from water as well)

    I hope it works for you but often treating and buffing the water - the costs add up to almost the same on r/0 saltmixes (also no possibility of adding live disease this way which there is with Nsw)

    Also bear in mind Durban/Kzn water is subtropical and corals naturally grow there, so it is closer to the water that is required for tropical setups- cold Atlantic water is nutrient rich and grows algae really well! eg. kelp forests as opposed to corals!
     
    Last edited: 20 Jul 2011
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