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  1. #21
    Senior Member Rank = Yonsai Twhitenosugar's Avatar
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    Sorry to hear that Craig. He was so close to being moved as well.

    I may be wrong on specifics, so please correct me if I'm wrong, but I recall sturgeon needing 8mg/l of Dissolved Oxygen, and i believe that once water goes past 28C, no matter how much aeration you put on, water is physically unable to hold enough DO to support Sturgeon.

    So to protect your other two in the current heatwave, it might be worth doing a largish water change once the pond passes 26C - providing the water you are putting in is much cooler.

    Or even buying a few bags of ice from a supermarket and dumping them in the pond might do the trick, along with some temporary shade.

    Sent from my SM-A520F using Tapatalk
    12,500L fibreglassed raised pond with window

  2. #22
    Quote Originally Posted by Twhitenosugar View Post
    Sorry to hear that Craig. He was so close to being moved as well.

    I may be wrong on specifics, so please correct me if I'm wrong, but I recall sturgeon needing 8mg/l of Dissolved Oxygen, and i believe that once water goes past 28C, no matter how much aeration you put on, water is physically unable to hold enough DO to support Sturgeon.

    So to protect your other two in the current heatwave, it might be worth doing a largish water change once the pond passes 26C - providing the water you are putting in is much cooler.

    Or even buying a few bags of ice from a supermarket and dumping them in the pond might do the trick, along with some temporary shade.

    Sent from my SM-A520F using Tapatalk
    Thanks for the advice as I didn’t know that about water not holding oxygen above 28.
    As they are in a temp holding pond at the moment I have been able to completely cover the pool for the last few weeks with sheets and old duvet covers but yesterday I put up a white PVC sail that I had made for my pond to complete shade the pool and removed some of the sheets to improve airflow on the surface of the water. I did put a couple of bags of ice in yesterday and did a large water change whilst vacuuming the water out.

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  4. #23
    Senior Member Rank = Supreme Champion freddyboy's Avatar
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    sorry to hear of the loss mate.

  5. #24
    Senior Member Rank = Yonsai Twhitenosugar's Avatar
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    Here you go, manky Sanke has a chart to explain. I hope he doesn't mind me directing you to his site

    Questions Answered

    Note that the figures given are at 100% saturation levels for the given temp. So probably best to go for a slightly lower temp, on the basis that you are probably not at 100% saturation level given that other fish and the filters will be consuming O2.

    So for the sturgeon, it's probably best to keep the pool under 25C if you can.

    Sent from my SM-A520F using Tapatalk
    12,500L fibreglassed raised pond with window

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  7. #25
    Quote Originally Posted by Twhitenosugar View Post
    Here you go, manky Sanke has a chart to explain. I hope he doesn't mind me directing you to his site

    Questions Answered

    Note that the figures given are at 100% saturation levels for the given temp. So probably best to go for a slightly lower temp, on the basis that you are probably not at 100% saturation level given that other fish and the filters will be consuming O2.

    So for the sturgeon, it's probably best to keep the pool under 25C if you can.

    Sent from my SM-A520F using Tapatalk
    many thanks for this I will have a good read and see what I need to do thanks again Craig.

 

 
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