Cape Town pH, KH, GH

Discussion in 'Beginner Discussions' started by Dave Abes, May 16, 2015.

  1. Chandz

    Chandz

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    Unfortunately the JBL ProScan results are highly inaccurate. I also bought it and the readings seemed off so I compared it to my liquid tests and PH pen (calibration is correct as the readings were compared to a lab grade pen), the readings are way off.

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  3. Hendre

    Hendre Polypterus freak

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    pH pens are pretty inaccurate even if calibrated properly, especially with the softer water in Cape town. Let your water "gas off" for 24 hours. You may notice immense amounts of bubbles in your tanks after a large water change; that's the gas added to help prevent pipe corrosion if I recall correctly. So the pH ends up lowering down to a more reasonable range.
     
  4. Chandz

    Chandz

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    Yes, PH pens with a glass electrode are slow to equilibrate to very soft, low conductivity water.

    You can add abit of salt to raise the conductivity, making the measurement easier for the electrode, without affecting the pH.

    I'm only trying to find out what the GH and KH is as unfortunately I ran out of the liquid test.


    I add other things to my water change water, aerate it then age it for for about 3 days to a week depending on my water change routine for that tank. However from time to time I do measure the water straight from tap using both a liquid test and PH pen, just for interest sake.




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  5. FMN716

    FMN716 Back in the GAME!!!

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    make sure you test the ammonia levels too

    For test strips I found the tetra ones to be good
     
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  6. A new day

    A new day

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    My ammonia is 0 luckily (liquid test)
     
  7. Innocent159

    Innocent159

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    Anyone use rain water? (straight from a harvest/jojo tank) Would like to find out that parameters
     
  8. Chandz

    Chandz

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    Becareful as rain water can contain pollutants. I would also mix it with tap water to prevent a pH crash

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  9. MariaS

    MariaS Moderator

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    Agree 100%.. I think i would be very scared of using rain water
     
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  10. Innocent159

    Innocent159

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    Okay thanks for the advice.
    I have been using rain water since the start of setting up my tank.

    How do i change to tap wate now? Straight with water change? I do about 50% (20L) water change weekly
     
  11. FMN716

    FMN716 Back in the GAME!!!

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    Have you got a 40l tank ?


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  12. Innocent159

    Innocent159

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  13. FMN716

    FMN716 Back in the GAME!!!

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    Just my 2c

    *You have a small tank so doing a 50% water change could really cause a problem I would start with a 20% every 2 days to ease in the new water
    *Make sure you have low ammonia water
    *instead of chasing ph numbers fish would rather prefer stability instead of fluctuations in the ph
    *if I was you you do a few test with quality strips like jbl and tetra (not the app version) of different places in CTN that have as close to your current water condition of slightly lower if you plan on reducing the values and get some 5l water bottles and use those to store the water and use them for your water change

    Also cured drift wood also helps lowering the gh of the water if I recall

    Hope this helps you
     
  14. Innocent159

    Innocent159

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    I am not looking to altering the water in any way. Just want a stable tank.

    I have been using rain water from the start so would like to prevent ph crash if I continue. I'll ease the shrimps into tap water with weekly small water changes/top up.

    Tank is over filtered ( tetra 700 canister) and only 5 shrimps so ammonia should not be an issue (use seachem water conditioner).
     
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