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  1. #21
    Extreme Koi Member Rank = Grand Champion lee63's Avatar
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    Just done a bit of messing about with the thermometers Just wanted a moan , so in the drum inlet its saying bang on 6c, the lead on my probe is only about 3ft long so i can get it about 2.5 ft down in the pond and still showing 6c. Also showing 6c just below the surface.
    The biggest surprise is the difference in air temps. Ambient air pond side is 5.9c at the minuite but under the covers the air is 8.8c. Theres been a bit of sun on the pond this morning so its definitly showing that under the lids. With the air running this will transfer some heat at the surface back to the pond obviously. Nearly a 3c temp difference between them ay.


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  3. #22
    Junior Member Rank = Tosai j1m's Avatar
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    I think you will always find that the temp of the water will be the same within a smidge where ever you put the thermometer if you have a bottom drain working.
    thast is why you must keep the water temp up to about 5 to 6 degrees in winter. if it was a lake with 15 feet of water and no pumps the bottom water stays at about 4 to 5 degrees.
    thats why the fish go down when its cold as we well as slowing right down

    thats my thoughts any way

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  5. #23
    Quote Originally Posted by lee63 View Post
    Just done a bit of messing about with the thermometers Just wanted a moan , so in the drum inlet its saying bang on 6c, the lead on my probe is only about 3ft long so i can get it about 2.5 ft down in the pond and still showing 6c. Also showing 6c just below the surface.
    The biggest surprise is the difference in air temps. Ambient air pond side is 5.9c at the minuite but under the covers the air is 8.8c. Theres been a bit of sun on the pond this morning so its definitly showing that under the lids. With the air running this will transfer some heat at the surface back to the pond obviously. Nearly a 3c temp difference between them ay.


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    What a fool i have been. I was led to believe it was warmer down there.
    On a pond. Thats why i had it done 6 feet. Not for more gallons. But for a little warmth for the fish. Now its bloody hard to net them. As you know lee. When we went fishing haha. Mind that was fun.
    So if i put a thermometer at my drum enter. From bottom drain. Should give temp at bottom of pond. Never even entered my head that. Right i am of to play. Haha

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  7. #24
    Quote Originally Posted by freddyboy View Post
    What a fool i have been. I was led to believe it was warmer down there.
    On a pond. Thats why i had it done 6 feet. Not for more gallons. But for a little warmth for the fish. Now its bloody hard to net them. As you know lee. When we went fishing haha. Mind that was fun.
    So if i put a thermometer at my drum enter. From bottom drain. Should give temp at bottom of pond. Never even entered my head that. Right i am of to play. Haha

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    When i did the test. Mine was colder on the bottom then the top at 1 foot down. 4.9c at top. 4.6 at nexus drum enter from bottom drain.

    Probably warmer up top. Because of sun warmth.

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  9. #25
    Extreme Koi Member Rank = Grand Champion lee63's Avatar
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    That would make sense to be fair fred, ambients been above pond temp so heat exchange going on nearer and at the surface Just wanted a moan yeah ive always had my probe either in the first bay of filtration or now in the inlet (dirty) side of the drum so its the water straight from bottom.


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  11. #26
    Extreme Koi Member Rank = Gosai anne's Avatar
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    . I am going to look for a thermometer that i can put six foot down. To see what it is down there.
    I am intrigued. So am I Fred , get a long bit of wood and fix the thermometer to it and i'll hang onto your ankles and dangle you over the side.

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  13. #27
    Quote Originally Posted by anne View Post
    . I am going to look for a thermometer that i can put six foot down. To see what it is down there.
    I am intrigued. So am I Fred , get a long bit of wood and fix the thermometer to it and i'll hang onto your ankles and dangle you over the side.
    haha brill made me laugh. or i could send patch down.

  14. #28
    Senior Member Rank = Yonsai Bonsaijohn's Avatar
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    Have you got a snorkel?

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  16. #29
    Quote Originally Posted by Bonsaijohn View Post
    Have you got a snorkel?
    no but i have a big pair of lungs haha

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