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  1. #21
    I am Ireland based too. I will be planning a rebuild next year so I am sorting out things now in advance. I plan to build my own drum filter and have started compiling the parts needed. I also plan to install an anoxic pond as I believe the science behind it. Old adage is to measure twice and cut once.

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  3. #22
    https://sacramentokoi.com/wp-content...18/05/3000.pdf Here is another read for you. They are a very experienced company for Koi pond building and they use 3" bottom drains instead of 4". You get more push with smaller pipe so it helps with gravity systems.

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  5. #23
    Senior Member Rank = Yonsai Tropheus's Avatar
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    My son started to dismantle the old pond today. I was going to hire a heavy duty breaker, but bought an SDS Drill/Breaker in B&Q for €98 that does the job. He removed a good bit of the right side in just under 2 hours before the weather set in. I hope to have it all removed over the next couple of weeks and then get a digger in to dig the hole.

    My only concern is the concrete base in the top part of the pond. I don't think the B&Q breaker will be quite up to concrete - it's 8cm AFAIR. It's fine for mortar when working on the rest of the pond.

    Ok, not my only concern. Few other things on my mind as I try to finalise plans.

    Haven't decided on one or two bottom drains. It makes sense to put in two as I won't be able to retro fit. Suppose I could put in two and only use one of them if needed? I'm not sure that I'll have a filter that will take two 4" connections. Still not decided on the filter BTW.

    What thickness of concrete base do I need for a 4m x 2.5m x 1.5m pond? I've seen 30cm mentioned which is 12 inches. Seems a bit much?

    Still also not decided on standard blocks on their side or rebar in hollow blocks. A little concerned about the pressure on the join between the blocks and the base with blocks on their side although it seems to work well for others. Is backfilling the standard blocks with concrete an option?

    IMG_0374[1].jpg

  6. #24
    You can hire any breaker if that's what you need. Get a skip too as clean as you go makes the work easier. once the walls are built and all your plumbing is in then back filling the finished walls is last.

  7. #25
    Senior Member Rank = Yonsai Tropheus's Avatar
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    Quote Originally Posted by the coyman View Post
    You can hire any breaker if that's what you need. Get a skip too as clean as you go makes the work easier. once the walls are built and all your plumbing is in then back filling the finished walls is last.
    We'll need a quote at some stage for the top soil. The builder told us he has someone lined up to come and take the granite. They'll be welcome to it as I don't fancy loading it into a skip.

    I'll see how I get on breaking up the slab at the weekend. I'll hire a heavier duty breaker if needed.

    Also got a recommendation for a guy with a digger. Hoping to get him to dig the hole in the next couple of weeks. He also has a truck so can take away the topsoil. Not sure if he'll be able to take it all, but it would be great if he could at least take some of it.

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  9. #26
    Senior Member Rank = Yonsai Tropheus's Avatar
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    Trying to get close to a final design. My wife is insisting there is a waterfall. I'm not pushed, but I could use it as an anoxic filter and plants.

    She likes water blades. The only ones I've see are pump fed. Are there any available that would go on a standard raised waterfall?

    I've also started working on a filter/pipe area beside the pond. This will be behind a shed so not visible from the patio. I wanted to put the skimmer in there. I'm guessing the waterfall will push the flow away from the skimmer so that's not a good place? Anywhere else will mean pipework is exposed.

    The top part for the waterfall will be about one meter long and 2.5 meters wide. It will be 80cms deep so should be more than enough to hold anoxic baskets for a 15,000l pond.

    Another complication is that the ground rises by half a meter about halfway along the pond. That means I'll have to dig down a bit for the filter bay. I'm thinking of a sieve or drum if I go anoxic.


    pond.jpg
    Last edited by Tropheus; 24-06-2020 at 11:09 PM.

  10. #27
    Senior Member Rank = Yonsai Tropheus's Avatar
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    Would I get away with a skimmer in the above position considering the flow from the wife's waterfall?

 

 
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