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Thread: Ph 8.8

  1. #1
    Extreme Koi Member Rank = Nisai nicke20's Avatar
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    Ph 8.8

    My fish have stopped feeding (they will still rise for the odd mealworm but my regular koi sticks just stay uneaten
    I have just done a water test and nitrates, nitrites and amonia are all coming back as close to zero, however the ph is 8.8
    ill assume this need getting close to 7.5 and is probably why they are not eating
    filtration is a nexus 200 and 55 watt uv
    how do i alter ph safely, and how fast?
    Thanks in advance



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  3. #2
    Quote Originally Posted by nicke20 View Post
    My fish have stopped feeding (they will still rise for the odd mealworm but my regular koi sticks just stay uneaten
    I have just done a water test and nitrates, nitrites and amonia are all coming back as close to zero, however the ph is 8.8
    ill assume this need getting close to 7.5 and is probably why they are not eating
    filtration is a nexus 200 and 55 watt uv
    how do i alter ph safely, and how fast?
    Thanks in advance
    My PH is often around 8.8 and I have no idea why. Would also be keen to hear if it's a good idea to lower but without knocking back the kh. My fish seem to be feeding okay.

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  4. #3
    Senior Member Rank = Nanasai rolo's Avatar
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    whats your tap water ph

  5. #4
    Mines 7.5, I know that this means that something is leaching into the pond but I'm stumped. Have heard about adding viniger buy am worried about knocking back the kh. Done tons of reading online buy apart from going for RO (not going to happen) I haven't read anything definitive.
    Tim

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    Senior Member Rank = Nanasai Big nige's Avatar
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    I got high pH and very high kh straight out the tap, when I do water changes I use 50% tap and50% filtered rain water keeps my pH and kh at good level. Used to do 1/3 rain but wasn't enough


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    Senior Member Rank = Jussai Djstiles999's Avatar
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    There was some discussion on a previous thread and a suggestion that all the algae, blanket weed etc produced oxygen from carbon dioxide during the day which raises PH, and process reverses at night reducing PH again. My pond probably shifts up by 0.5 during the course of the day

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  10. #7
    Senior Member Rank = Supreme Champion RS2OOO's Avatar
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    If it's of any use to anyone I discovered my pond gets a pH spike every year at some point between end of March and early May.

    Had it again last week and that's when I looked at previous records and discovered the pattern.

    Possibly being caused by photosynthesis as temps warm up and algae etc starts to multiply.

    The spike only lasts a week, maximum 2 weeks. Maybe if others are seeing spikes it might be worth holding off for a week to see if it normalises.

    Btw, pond pH will always be higher than tap pH as the pH rises once the water is dechlorinated.

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