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  1. Replies
    435
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    30,411

    Dipping in and out of this thread you appear to...

    Dipping in and out of this thread you appear to have thought of pretty much everything.
    One aspect that I do think might be worth revisiting is "system stability" and hence "system resilience".
    It...
  2. Replies
    37
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    2,696

    If you're starting from scratch and ball valves...

    If you're starting from scratch and ball valves are hard to get hold of you may be interested to know that my system with 4"/110mm gravity flow in and out has no ball valves fitted. I use my own...
  3. Replies
    37
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    2,696

    I would seriously consider recoating the surface...

    I would seriously consider recoating the surface with black. A lot of hard work to do properly, but as biofilm builds up on blue it never looks good and you'd almost certainly regret it.

    I have a...
  4. Replies
    435
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    30,411

    With regard to your return covers. I have an...

    With regard to your return covers.
    I have an open 110mm return and have yet to have a fish swim up it in 4 years of running this system. Smallest fish is just under 60cm.
    In a previous pond I had a...
  5. Replies
    435
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    30,411

    I manage this 12500 litre pond on one 110mm...

    I manage this 12500 litre pond on one 110mm gravity return, one 110mm bottom drain and one 110mm skimmer line (air lift half way through filter system), so unless you plan to have crazy throughput...
  6. For when we're away I adapted a Petkit cat/dog...

    For when we're away I adapted a Petkit cat/dog feeder to feed our fish.
    It allows WiFi control via an App (amount, timings, etc) and when used in conjunction with our CCTV I can monitor pond temp...
  7. Replies
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    2,393

    I have always resorted to a mechanical connection...

    I have always resorted to a mechanical connection when using PP. Sometimes use a sealant as a "gasket" in such cases.
  8. Thread: Pondman

    by Ukzero
    Replies
    41
    Views
    12,011

    I have kept Koi since the late 1980s. The basic...

    I have kept Koi since the late 1980s.
    The basic rules don't appear to have changed that much, but technology and trends have moved on somewhat.
    One thing I have noticed is that the internet/social...
  9. Replies
    435
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    30,411

    With my single air lift and single vent I get a...

    With my single air lift and single vent I get a lot of bubbles. Luckily as it's half way through the filter it serves as a handy foam fractionator (at least it will when I get round to building an...
  10. Replies
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    My air lift is half way through the filter system...

    My air lift is half way through the filter system - gravity fed to the airlift and gravity fed back to pond. Pond return is 110mm.
    42478
  11. The key design feature of my anoxic system was...

    The key design feature of my anoxic system was the ability to progressively bypass the moving bed to the point where it is just about ticking over with minimal NH3 input, whereas the Anoxic section...
  12. Having done a degree in geology (granted, many...

    Having done a degree in geology (granted, many decades ago) my approach to rockery design is very simple and encapsulated in one sentence.
    "It should look like a natural outcrop and not like...
  13. Been mentioned before. Our pond is 100%...

    Been mentioned before.
    Our pond is 100% in-ground.
    Our pond is 0% insulated.
    The ground acts as an excellent heat buffer throughout the year with the following limitations:

    The highest temp...
  14. Replies
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    307

    Yet another reason to consider air-lift...

    Yet another reason to consider air-lift circulation it seems :)
  15. Replies
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    576

    Blatently veering off on a tangent, one of my few...

    Blatently veering off on a tangent, one of my few pet hates is the adoption of "sea salt" as the most desirable additive to our food.
    Crisps now almost exclusively proclaim to be seasoned with "sea...
  16. Replies
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    1,413

    The shusui recovered slowly but part of the...

    The shusui recovered slowly but part of the problem may be that it's a nervous feeder.
    After a treatment the following year the 71cm kujaku also stopped feeding and never restarted. It was checked...
  17. Replies
    54
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    3,068

    I think that to connect your home generation...

    I think that to connect your home generation system to the grid, the local network operator will still probably insist on certification by qualified installers - even if not MCS.
    I guess it is in...
  18. Replies
    54
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    3,068

    Using about 99kWh per month in Summer to run the...

    Using about 99kWh per month in Summer to run the pond.
    This is consumed by the air lift air pump a smaller air pump and UV (only on during daylight hours) and short bursts from the drum system. Air...
  19. Replies
    435
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    30,411

    Looks a bit late to suggest this, but for others...

    Looks a bit late to suggest this, but for others considering similar, when I built my filter shed I lined the wall frame with breathable roofing membrane. It's extra weatherproofing and protection...
  20. Replies
    3
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    360

    The draw of even full flow through a single...

    The draw of even full flow through a single bottom drain only has a real effective radius of about 30cm on settled or settling heavier material.
    The secret is to prevent material from settling out...
  21. Replies
    53
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    1,197

    I have my UV hooked to a light sensor so that it...

    I have my UV hooked to a light sensor so that it only comes on when daylight reaches a set point (backwards compared to most light sensors).
    This means the "on time" is directly related to "yummy...
  22. Replies
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    452

    My trickle in is currently running at an average...

    My trickle in is currently running at an average of 0.08% per day and this is as "on-demand" from the water lost by drum rinsing (which is set to infrequent as the water is crystal clear and the air...
  23. Replies
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    303

    From my own experience: If you do not intend to...

    From my own experience:
    If you do not intend to heat then the pond should be:
    Fully in-ground (so no windows,etc).
    Not insulated (the ground acts as a useful temperature buffer both in hot and...
  24. Thread: DIY Air Curtain

    by Ukzero
    Replies
    78
    Views
    5,034

    Understood. Having an unfashionable all...

    Understood.
    Having an unfashionable all in-ground setup with no insulation means the ground buffers temperatures in our pond. So despite being in full sun it's never been over 23C in any Summer....
  25. Thread: DIY Air Curtain

    by Ukzero
    Replies
    78
    Views
    5,034

    Just noticed this thread. I'm guessing the...

    Just noticed this thread.
    I'm guessing the purpose of an air curtain is purely to counter measured or potential drops in O2 levels and would not be an aesthetic choice?
    I'm a koi keeping dinosaur,...
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