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  • Results 1 to 16 of 16

    Thread: Using Vinegar to Lower PH

    1. #1
      TJeep's Avatar
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      Using Vinegar to Lower PH

      I'm using vinegar to lower my pond's PH. My main question is how long will the PH remain lower using this method? Should I be testing PH Daily? Weekly? Monthly? once it is down to the correct level? Mainly I'm curious how long it lasts. Thank you!

    2. #2
      Paul Sabucchi's Avatar
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      Any particular reason you want to lower pH? While you have carbonates in your water the pH will swing back pretty quickly, once you have poured in enough vinegar to neutralize the buffering (and maybe pickle the fish) you are at risk of the pH crashing out of control. Just my 2c

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      Quote Originally Posted by TJeep View Post
      I'm using vinegar to lower my pond's PH.
      How high was your PH when you started?

    4. #4
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      There should never be a reason to lower the PH other than buffering with something that maintains a stable level like baking soda , which will buffer to the low to mid 8’s .
      A stable PH is more important than it’s level , so a high PH is OK . A lower PH has the danger of killing Your Bio filter , what We call a PH crash .

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      I had two goldfish do rapid (2-3 day) color changes to 100% white and read it could be the result of high PH. My PH was in the 9+ range, but since my test only goes to 9 I'm not sure how much higher it was or if it was exactly at 9. over the course of a week I brought the PH down to ~7.8

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      What test are you using?

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      Quote Originally Posted by TJeep View Post
      I had two goldfish do rapid (2-3 day) color changes to 100% white and read it could be the result of high PH. My PH was in the 9+ range, but since my test only goes to 9 I'm not sure how much higher it was or if it was exactly at 9. over the course of a week I brought the PH down to ~7.8
      Instead of using an acid , buffer with baking soda

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      Quote Originally Posted by Paul Sabucchi View Post
      What test are you using?
      API Test kits... one for normal PH and another for high PH

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      Quote Originally Posted by catfish whiskers View Post
      Instead of using an acid , buffer with baking soda
      I thought baking soda raised PH not lowered it.

    10. #10
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      Quote Originally Posted by TJeep View Post
      API Test kits... one for normal PH and another for high PH
      Ok, so they are usually reliable. Any chance your water company publishes online the analysis of their water?

    11. #11
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      Quote Originally Posted by TJeep View Post
      I thought baking soda raised PH not lowered it.
      It will buffer the PH to around 8.3
      It will only raise the PH if the PH is below the low to mid 8’s . If the PH is above the low to mid 8’s , the baking soda will lower the PH to the low to mid 8’s

    12. #12
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      Quote Originally Posted by TJeep View Post
      I thought baking soda raised PH not lowered it.
      Every acid or base when in water will react with it and form a certain amount of its coniugated base or acid (respectively), this ratio is typical of each substance and will form a buffer that will tend to peg the pH at a certain level

    13. #13
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      What is the material finish your pond water is in contact with?
      Find more about Weather in Durban, ZA

    14. #14
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      Check you ph and kh from water source
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      Color change in goldfish is normal and inevitable. Maybe the high pH caused a more rapid change, maybe not, but genetics dictates that these fish would have changed eventually. I would not play around with pH adjustments based on this happenstance.
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    16. #16
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      I agree with adding baking soda to buffer (stabilize) your pH. What’s more important with pH and koi/goldfish, is that the pH stays constant. If your pH is too acidic or basic, and gets “unbuffered”- wild pH swings can occur, causing the issues you’re seeing, and also possibly endanger the lives of your fish. Years ago before obtaining koi, I lost a tank of goldfish to what’s known as a pH crash. Not fun. After that, I started reading up on pH and KH, and I believe the KH value (let’s call it the buffering capability of the water, or the ability to resist a change in pH) is much more important than pH. If you keep the KH buffered at about 8.1-8.2 (API drop test kit) with baking soda at about 10 drops, you’ll never have to measure pH again.

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