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  1. #81
    Senior Member Rank = Kyusai Tom Koi's Avatar
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    Quote Originally Posted by Koiz View Post
    These are what I've used for 3 years:
    https://www.amazon.co.uk/gp/aw/d/B07...b_b_asin_title

    They are surprisingly accurate and very easy to read with nice big digits. I use 2 at a time to ensure consistency of readings. They are not waterproof but I've accidently gotten them wet, and even dropped them where they've broken apart and put them back together again. Still work! I've also never changed the batteries yet and they are used pretty much every day.

    I love having the redundancy of 4, and have often needed to use them all when I've got fish in bowls or the Intex. Great for ensuring acclimatisation when transferring fish.

    I've now got an Oase Proficlear that gives me a constant 2 digit temp reading in my filter house, and these aquarium thermos have been in line with that without fault.

    Can't knock 'em for price and versatility.

    Sent from my SM-N910F using Tapatalk
    They similar to the ones I've got ain't tried them yet though. not sure if they be suitable for the pond though which is 4,1/2 to 5,000 gallons.
    Last edited by Tom Koi; 23-10-2020 at 08:46 PM.

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  3. #82
    Senior Member Rank = Supreme Champion Ajm's Avatar
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    Quote Originally Posted by Tom Koi View Post
    They similar to the ones I've got ain't tried them yet though. not sure if they be suitable for the pond though which is 4,1/2 to 5,000 gallons.
    Surely shouldn't matter on mass volume tho . They are all pretty much the same i got a cheap one off ebay and a expensive aqua one from lfs and couldn't tell the difference
    Freddyboy the legend

    "we are water keepers first"

    Johnathan

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  5. #83
    Senior Member Rank = Kyusai Koiz's Avatar
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    Quote Originally Posted by Tom Koi View Post
    They similar to the ones I've got ain't tried them yet though. not sure if they be suitable for the pond though which is 4,1/2 to 5,000 gallons.
    Water volume makes no difference. You just dangle the sensor in the water! Mine work in a 10L bucket, 100L bowl, 1600L Intex and my 11440L pond Winter Polycarbonate covers for a Wooden Sleeper Pond

    Sent from my SM-N910F using Tapatalk
    11,440L Raised Pond, BD, Oase ProfiClear, Bitron 55W, 2x10k Aquaforte Varios, Skimmer to Waterblade

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  7. #84
    Senior Member Rank = Kyusai Tom Koi's Avatar
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    Quote Originally Posted by Koiz View Post
    Water volume makes no difference. You just dangle the sensor in the water! Mine work in a 10L bucket, 100L bowl, 1600L Intex and my 11440L pond Winter Polycarbonate covers for a Wooden Sleeper Pond

    Sent from my SM-N910F using Tapatalk
    Aye, I see your point, I didn't think that one through

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  9. #85
    Senior Member Rank = Supreme Champion freddyboy's Avatar
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    I have the same ones as koize. Cheap as chips.
    I use 2 in the grow on. And one on my 5000
    Gallon pond.
    And have 3 spare. Ready to replace. When they pack up.
    Used them for 6 years now. I just replace them every year. Even if there still working or not. When I change my UV bulbs.
    Fred

    Sent from my SM-G960F using Tapatalk

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  11. #86
    I fear this may be a dumb question but which way up did you fit the sheeting?
    It comes with Uv protection on one side, not sure if the koi need the U.v. for colour enhancement or whether they need protecting from it.

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  13. #87
    Senior Member Rank = Grand Champion RS2OOO's Avatar
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    Bought mine new and the cellophane wrap showed which side was top. Can't see any other obvious way to tell.

    I wouldn't have thought it would make a huge difference which way round you fit it since UV and sunburn on koi isn't such an issue during the months we cover for.

    Sent from my Pixel 4a using Tapatalk

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  15. #88
    Quote Originally Posted by RS2OOO View Post
    Bought mine new and the cellophane wrap showed which side was top. Can't see any other obvious way to tell.

    I wouldn't have thought it would make a huge difference which way round you fit it since UV and sunburn on koi isn't such an issue during the months we cover for.

    Sent from my Pixel 4a using Tapatalk
    Didn't explain myself properly, sorry. As you say the wrap indicates which way is up. I wasn't concerned about the fish getting sun burn but rather which way (if any) would be the best for maintaining their colour, U.V. light getting through or no U.V.

  16. #89
    Senior Member Rank = Grand Champion RS2OOO's Avatar
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    Quote Originally Posted by g mac View Post
    Didn't explain myself properly, sorry. As you say the wrap indicates which way is up. I wasn't concerned about the fish getting sun burn but rather which way (if any) would be the best for maintaining their colour, U.V. light getting through or no U.V.
    A difficult question that would probably get different answers.

    I would favour allowing UV to get through because I've had fish lose colour when light is completely blocked out, but understand that light and UV aren't the same thing.

    On the other hand koi in mud ponds don't get much UV penetration and their colour is fine.

    Allowing UV has to be better than completely blocking it though.





    Sent from my Pixel 4a using Tapatalk

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  18. #90
    Senior Member Rank = Yonsai Jampot's Avatar
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    I always thought the UV protection to the top or outside of the polycarbonate was to protect the plastic from UV rather than what's on the other side of it.

    It may degrade quicker if using it 'upside down'.

    Jim
    I don't keep fish, I keep water. I don't keep fish, I keep water. I don't keep fish I kee........

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  20. #91
    Senior Member Rank = Grand Champion RS2OOO's Avatar
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    Quote Originally Posted by Jampot View Post
    I always thought the UV protection to the top or outside of the polycarbonate was to protect the plastic from UV rather than what's on the other side of it.

    It may degrade quicker if using it 'upside down'.

    Jim
    That sounds logical, didn't think about it like that.

    I randomly searched for the answer to that point and a Q&A section of a Polycarb site said this, but you never know if its accurate 'cos they just wanna sell the stuff:

    Q. Why choose multiwall polycarbonate for a pool enclosure?
    A. Light in weight, polycarbonate is easy to handle and install. Panels are incredibly strong and will not shatter like glass if damaged. Thermal insulation properties keep the enclosed pool area warmer. The UV-treated outer surface provides sun protection, reducing the risk of sunburn.
    Last edited by RS2OOO; 30-11-2020 at 05:22 PM.

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  22. #92
    Senior Member Rank = Yonsai Jampot's Avatar
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    reducing the risk of sunburn
    Oh, if only that was something to worry about!

    Jim
    I don't keep fish, I keep water. I don't keep fish, I keep water. I don't keep fish I kee........

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  24. #93
    Senior Member Rank = Grand Champion RS2OOO's Avatar
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    Just a belated update to this thread as to how the covers performed.....

    Made a massive difference throughout winter. On average temps were around the 12C mark (with 300w aquarium heater running with stat set to 12C.)

    I gradually reduced stat to 8C at the coldest part of winter to give the koi a period of cold temps and it took quite a number of days for the pond to drop down and at no point did it drop below 8C even though ambient temps were below zero for a number of days.

    The hippo tape I used between the poly sheets as "hinges" performed really well and lasted all winter. When I lifted the covers in April the tape was still stuck solid and was such a pain to remove that I gave up peeling it and just cut the panels apart with a stanley blade.

    So all in all the covers were a great success.

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  26. #94
    Senior Member Rank = Kyusai Tom Koi's Avatar
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    Quote Originally Posted by RS2OOO View Post
    Just a belated update to this thread as to how the covers performed.....

    Made a massive difference throughout winter. On average temps were around the 12C mark (with 300w aquarium heater running with stat set to 12C.)

    I gradually reduced stat to 8C at the coldest part of winter to give the koi a period of cold temps and it took quite a number of days for the pond to drop down and at no point did it drop below 8C even though ambient temps were below zero for a number of days.

    The hippo tape I used between the poly sheets as "hinges" performed really well and lasted all winter. When I lifted the covers in April the tape was still stuck solid and was such a pain to remove that I gave up peeling it and just cut the panels apart with a stanley blade.

    So all in all the covers were a great success.


    What was the thickness of the polycarb RS?

  27. #95
    Senior Member Rank = Grand Champion RS2OOO's Avatar
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    Quote Originally Posted by Tom Koi View Post
    What was the thickness of the polycarb RS?
    As explained in the first post, went for 25mm.

    Sent from my Pixel 4a using Tapatalk

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  29. #96
    Senior Member Rank = Nanasai Mike Bass's Avatar
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    Just in case anyone is interested in some 16mm polycarbonate sheets in the Midlands area on £b@y selected off cuts reclaimed from conservatory upgrades reasonably priced 650mm wide 2m to 2.9m for £18 a sheet various lengths and prices. I have bought 8 sheets bargain for £144

    https://www.ebay.co.uk/itm/274921629...r=575196211133
    1kGal BD/Skim RDF/UV/k1 2.3kGal 2windows 2airBD/skim Sieve/Eazypod RDFcombi 3xVP/UV,ASHP

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  31. #97
    Extreme Koi Member Rank = Nisai AntB's Avatar
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    Has anyone else made the decision not to cover their pond? When covered I found I was having issues in spring and sometimes losing fish. Since I stopped putting the covers on I have had no problems. I only heat to 10 degrees, and the extra cost of heating uncovered is offset by not having to pay to replace fish.

 

 
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