Any Negative Effects To Very High Kh? Help

Discussion in 'pH' started by Gatesy, Apr 17, 2018.

  1. GatesyValued MemberMember

    Hi all

    One of my tanks that houses yellow labs has over 26Dkh
    I stopped testing at this point because I felt it was unessacery

    But I was wondering if an extremely high KH would have any negative effects on my fish?

    Thanks Gatesy
  2. sfsammWell Known MemberMember

    What kind of fish do you have? Have you checked the expiration date of your test regents? Are you shaking the bottle for at least a minute prior to testing? And lastly... What is your pH?
  3. GatesyValued MemberMember

    This tank houses 4 yellow labs (Labidochromis caeruleus)

    The expiration of my GH KH kit is sometime in 2020, bottles all get shaken harshly before testing, tests are accurate as all my other tanks are testing exactly where I want them
    PH sits steady at 8.4

    The reason why I ask is because I buffer this water with KH conditioner and could adjust the amount I use at water changes but it's more convienient to just use 1 teaspoon to each bucket of water

    I know a lot of people on this forum do not like buffering water with chemicals, but I have had great success with them and find buffering naturally can cause my PH to drop after water changes before crushed coral/limestone etc can leach out and raise it again.

    Thanks for the reply :)
  4. sfsammWell Known MemberMember

    So you know why your kH is sky-high why not add the kH booster to every other bucket until it comes down a bit so that you don't have to worry? Sounds as if you're adding an exorbitant amount of it. It could cause your pH to become too high to be tolerable for even African cichlids...
  5. GatesyValued MemberMember

    Have just done what you suggested sfsamm, used a mesureing spoon to half what I was adding to each bucket

    PH has dropped to 8.2 and 14dKH

    Much happier with these numbers :), I'll just test after each water change and adjust my input accordingly until the numbers are stable

    Still curious though if anyone does know if a very high KH can have any effects to fish?, even when PH is ideal, I have googled but haven't found anything to satisfy my curiousity

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