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  1. #1

    30ft "stream" could I use alfagrog or similar?

    Got a lined stream that's fed via an in pond pump to a pod, at the moment the liner has a few pebbles/slate in it, but looks stupid.

    So looking to create a top shallow pond to put in some anoxic baskets, but looking for suggestions for the whole run.

    Saw someone else mention resin and stones, but actually then thought would I be able to put in alfagrog or another media to actually do some good, but also could help the aesthetics of the liner.

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  2. #2
    Senior Member Rank = Gosai Twhitenosugar's Avatar
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    If I was you I wouldn't put anything in the stream.

    We had a 4 tier waterfall/cascade on a small goldfish pond when I was younger. I put gravel in the waterfall to make it look more realistic and it soon got covered in blanket weed and the amount of crap that would build up between the stones was unreal.

    I personally think leaving it clear so the water can flow well is your best bet. But to improve its looks maybe have a look at getting decent edging stones. They can hide the edge of the liner and also, with a bit of strategic placing, they make the stream look less straight and can create Eddie's and whirlpools.



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  4. #3
    Think about putting some plants in it, not only will you improve the look but you will remove nitrates and help slow blanket weed growth. Try not to use any soil just put the plants in gobbles or shingle, you may even find that it works as part of your filter. But you must be prepared to clean it out as i do once a year and I only run it in the summer . When I tested my nitrate Sunday it was below 10ppm.

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  6. #4
    Senior Member Rank = Yonsai SamuraiJack's Avatar
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    I can understand your thinking of Alfagrogs doing some good but as mentioned they will eventually get clogged with muck and other stuff which if not cleaned can breed bad bacteria and harbour parasites, plus Alfagrogs are hard to clean, I could be wrong.
    Human life is truly a short affair. It is better to live doing the things that you like Inazo Nitobe

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  8. #5
    Could you not use those Storage crates In conjunction with large size alfagrog? I reckon could be pretty effective for extra bio filtration with flow going through them,I would only try though if the water coming is clean/relatively clean as already mentioned it can soon become a holding area for loads of crap

  9. #6
    Senior Member Rank = Gosai JimJones's Avatar
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    Quote Originally Posted by Twhitenosugar View Post
    If I was you I wouldn't put anything in the stream.

    We had a 4 tier waterfall/cascade on a small goldfish pond when I was younger. I put gravel in the waterfall to make it look more realistic and it soon got covered in blanket weed and the amount of crap that would build up between the stones was unreal.

    I personally think leaving it clear so the water can flow well is your best bet. But to improve its looks maybe have a look at getting decent edging stones. They can hide the edge of the liner and also, with a bit of strategic placing, they make the stream look less straight and can create Eddie's and whirlpools.



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    Was that with pre filtration ie sieve or something similar?




    Jim

  10. #7
    Senior Member Rank = Gosai JimJones's Avatar
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    Are you putting fish in?

    You could put a UV in circuit that would help rid of blanket weed and put something like a sieve in too to remove waste in general.

    Are you going to line the sides and bottom of the stream like a real one if so use pebbles and put some for of bio in a filter box after the pump.

    you could use grog but i can get sharp in bits and might puncture the liner.

    Jim

  11. #8
    Senior Member Rank = Gosai Twhitenosugar's Avatar
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    Quote Originally Posted by JimJones View Post
    Was that with pre filtration ie sieve or something similar?




    Jim
    The water that went down the waterfall was filtered through a black box filter and a yamitsu algae master uv lamp.

    So not exactly the best filter in the world lol. But then again it was only a good fish pond rather than koi

    But I think even with well filtered water the blanket weed will build up if there are nitrates and phosphates present (which are in most ponds). Having a UV before the stream unfortunately won't prevent blanket weed building up, but should prevent the water become pea soup colour.

    And even with a drum filter before the watercourse, I think crud will still eventually build up amongst the grog in the stream.

    I still think boulders along the edging, with some jutting into the stream would be the best of both worlds ie more natural looking but less areas for crap to build up in.

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    Last edited by Twhitenosugar; 15-09-2020 at 02:17 PM.
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  13. #9
    i'll try and get a video of it, but it's already in place, the problem mainly is for aesthetics with a lot of liner showing, as it's in such a sloping garden in some places it's a been dug about 12+ inches deep (but the water only runs at about 3 inches.

    so i'm planning on digging wider at least at one part up on the bend at the top to have anoxic baskets up there.

  14. #10
    Senior Member Rank = Gosai JimJones's Avatar
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    Perhaps sealing the gaps between boulder with waterfall foam would help avoiding any traps too.

    If you are that serioous perhaps run before your water water a small shower to gas of nitrates? this would help avoid the blanket weed.

    Jim

 

 

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