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Thread: Koi Pond Help

  1. #21
    Senior Member Rank = Kyusai Djstiles999's Avatar
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    That looks like a great solution, benefits of gravity feed to the sieve from BD is well worth the tiny bit of effort, I’d be inclined to do this if I couldn’t go gravity

  2. #22
    Brilliant thanks

  3. #23
    Extreme Koi Member Rank = Hassai freddy's Avatar
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    Quote Originally Posted by MalNorwich View Post
    That's what I do as my pond is ground level, filter pit with a sieve and then pump to nexus 300 and shower, bead off skimmer to ASHP, works really well.
    I was thinking in terms of a drum/container with a pump in it, fed from the bottom drain. The beauty of a pump-fed, as I see it, is that the filter/s can be placed in a remote/convenient location without having to consider levels. As it happens, Iím considering building pond #3, which if I go ahead, would be in-ground (my preferred option). As space is at a premium, pump-fed is the only viable option, for me.

  4. #24
    Quote Originally Posted by freddy View Post
    I was thinking in terms of a drum/container with a pump in it, fed from the bottom drain. The beauty of a pump-fed, as I see it, is that the filter/s can be placed in a remote/convenient location without having to consider levels. As it happens, I’m considering building pond #3, which if I go ahead, would be in-ground (my preferred option). As space is at a premium, pump-fed is the only viable option, for me.
    I tried that many years ago, it was a nightmare to keep clean, the amount of crap that got in the tank was a ridiculous, pump was constantly getting blocked. I soon changed that, it was taking up too much time.

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  6. #25
    Extreme Koi Member Rank = Hassai freddy's Avatar
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    Quote Originally Posted by MalNorwich View Post
    I tried that many years ago, it was a nightmare to keep clean, the amount of crap that got in the tank was a ridiculous, pump was constantly getting blocked. I soon changed that, it was taking up too much time.
    Thanks for that. Can I ask...was the drum/container you used benched?

  7. #26
    Senior Member Rank = Yonsai KevT's Avatar
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    Hi

    My take on this is that a pumped system acts like a hydro pulper and this makes getting all the small bits out of the water in the filter more difficult - the simple fact is you need less pump power (£'s) to move the water from the mechanical separation area of your filter to the bio filter area on gravity fed. A retro bottom drain is possible, but the hydro pulper action will always cause issues and you are pumping the water all the way from the pond bottom to the top of the filters more wattage = higher £'s running costs.

    I only lift the water from my mechanical filter from about 2 inches below the pond surface to the top of my home made trickle filters approx 1 mitre in a 50mm pipe vertically so I loose virtually no flow and it flows back via gravity. My two 3000 litre pond pumps only use 10 watts per pump and move the water from my skimmer and Easypod perfectly turning my 9000 litre pond over every couple of hours. You will need a more powerful pump with a retro bottom drain which costs more £'s to run, the reduced running costs of gravity could balance out the initial outlay moving forward. As I said in previous post bottom drains don't need to be anything other than a simple one without aeration combi - you can always drop an air stone on top of a standard bottom drain. Myself I don't like loads of bubbles and rely on the trickle filters to add the air and have a nice still surface to view the koi.

    It's all about planning at the beginning to get as trouble free a pond as possible, if possible visit a few ponds I'm sure there will people on here who live close enough for you to pop around for a chat.

    KevT

  8. #27
    Thanks again. I am now trying to see if I can make a gravity system work in my garden…

  9. #28
    Senior Member Rank = Yonsai KevT's Avatar
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    Hi

    The extra bit of digging will be worth it to set the pipe into a channel sat on gravel and encased in concrete with the bottom drain unit encased in a concrete area too. The pipe can go to a multi chamber, if you dig the multi chamber in the ground it's simple to draw the water through the filter, and then up to a trickle filter and gravity back to the pond. The only consideration is how to flush the bottom drain - I would put a "T" section in to allow you to rod the bottom drain and then the muck can be caught in the filter and pumped away to waste. This would be simpler if the pond was 50% out of the ground. This is a great video I watched it loads of times before starting

    KevT

    https://www.youtube.com/watch?v=J6CH39FPRps&t=1163s

 

 
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