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Results 1 to 5 of 5
  1. #1

    Question Are there specific kinds of rocks that could result in high PH

    0 Not allowed!
    More tales of woe: 55 gal tank, 4 gold fish, struggling with high nitrites and my pH is 8.2. We have added some rocks that we have picked up in the desert. They were scrubbed before we put them in.

    Are there specific kinds of rocks that should not go in the aquarium?

  2. #2


    1 Not allowed!
    One test I've been advised of here is to put a few drops of vinegar onto any rock that you are considering putting into a tank...if the vinegar starts bubbling up/foaming, you do not want to use that rock...I believe it has something to do with calcium content, but not positive about will mess with your ph, I think it actually LOWERS it, but again not positive about that
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  3. #3


    2 Not allowed!
    High nitrites may result from high stocking and possibly an incomplete cycle. Water changes to keep them below 0.25 ppm are a must. As for rocks, the main concern with them is that certain rocks leach minerals such as calcium carbonate into the water that can increase hardness and pH. Wi goldfish this may not be too much of a concern as they prefer harder water, but if a rock is known to leach minerals I still wouldn't put in large quantities of it. So how do you know whether a certain stone might be prone to do so? Drop vinegar on it, and if it fizzles then it will likely leach, if it doesn't then it is inert.

  4. #4


    0 Not allowed!
    Just tested all of my tanks and they were all 8.2. I tested my tap water and it 8.2..... Any suggestions?

  5. #5


    1 Not allowed!
    Test for hardness. If the water is also hard the only thing you can do is add reverse osmosis water. If it's soft then a source of acid like elder cones can help.

    A ph of 8 isn't that big a problem for goldfish though.

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