At the cross roads between filter types - need help...

Discussion in 'DIY - Do It Yourself' started by poobs, Aug 31, 2017.

  1. poobs

    poobs

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    Hello fellow members !!!


    I have a 2500 in-ground pond in the Florida sun.


    Filter is an old Nitramax by AZ Ponds. ( A converted pool sand filter )

    This filter doubles as Biological and Mechanical filtration but it doesn't filter very well mechanically and it doesn't back wash unless I manually stir the media with my arm before switching the valve to back- wash mode.


    Lately the filter has been showing its age. I thought about rebuilding the valve but it is fairly obsolete.


    So my options as I see them are as follows:


    A Pricey Koi Pond Filter such as the Ultima $$$$


    A new pool sand filter that I would adapt to koi pond duty by changing to a koi pond media instead of sand.


    A DIY design such as those floating around the web.


    Any filter I decide to implement will change the basic lay-out of the pond as far as the filtration goes…. I will change the location of the filter, reduce the number and angle of piping bends to and from the filter, add a pump pit so as to lower the pump below the pond water level, add a pre filter and or possibly a Siff style filter.


    An absolute MUST in this project is that the filter be able to back-wash.


    I’m a little undecided about the DIY type since I’m not aware of any of these that truly back wash.


    Any ideas, comments etc greatly appreciated. J


    BTW For some reason I’m not able to view photos in this forum .


    Thanks in advance for your advice.
     
    poobs, Aug 31, 2017
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  2. poobs

    Tula

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    My husband built a Sand and Gravel filter this Spring and it works well and can be back washed, with a blower. Our pond is smaller then yours, at 1700 gallons.
     
    Tula, Aug 31, 2017
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  3. poobs

    poobs

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    Thank you for your prompt response. :)
     
    poobs, Aug 31, 2017
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  4. poobs

    Meyer Jordan Tadpole

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    Whatever you decide for providing biofiltration you also need to supply separate mechanical filtration. Dual purpose (mechanical/biological) filters are, frankly, a joke.
     
    Meyer Jordan, Aug 31, 2017
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  5. poobs

    poobs

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    You're right ! Most design compromises leave something on the design table.

    This is the reason I said I would add something to the filter either before or after .... probably before to reduce the load on the filter .
     
    poobs, Aug 31, 2017
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  6. poobs

    Mmathis TurtleMommy

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    Yep!
     
    Mmathis, Aug 31, 2017
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  7. poobs

    poobs

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    Come to think of it ..... If I have to add something in front of the main filter to keep it so a back wash will make it ready to filter again and that pre filter is going to get real mucky - that sort of defeats the purpose of having a filter that is back - washable via a valve like a pool filter. ;)
     
    poobs, Aug 31, 2017
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  8. poobs

    Gemma

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    Is a skimmer box and waterfall stocked with media a "dual purpose" filter?
     
    Gemma, Aug 31, 2017
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  9. poobs

    sissy sissy

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    I don;t have a mechanical filter and never have had one .Lava rock, furnace filters and quilt batting works for me .I guess in a way the crate on top of my filter is a type of home made mechanical filter .I know it works
     
    sissy, Aug 31, 2017
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  10. poobs

    Meyer Jordan Tadpole

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    No, because these are two separate units. One is primarily for mechanical filtration (skimmer) and one is primarily for biofiltration (waterfall filter).
     
    Meyer Jordan, Aug 31, 2017
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  11. poobs

    Gemma

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    I'm so glad you said that! I always seen it as one single unit, that's why I asked!
     
    Gemma, Aug 31, 2017
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  12. poobs

    poobs

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    I've been over thinking this.....

    Had a skimmer normally sold for above ground pools that worked well as a skimmer for leaves and an occasional fish. It also Td to a valve and bottom pick up so I could gather leaves both form surface and bottom.
    I removed the skimmer cause I got tired of emptying in the fall. Instead I would pick the junk from the bottom with a hand held pool skimmer basket thing.
     
    poobs, Aug 31, 2017
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  13. poobs

    poobs

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    It looks like I need to dig a pump pit to get my pump and maybe a Sieve below water level ? I just had a fit after I cleaned my filter. Tried sticking the shop vac into it and blowing the media around. Crap, media and water went everywhere !!! Even the fish laughed [​IMG]
     
    poobs, Sep 1, 2017
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  14. poobs

    sissy sissy

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    Had to laugh ,should have made a video of that so we could have all gotten and laugh out of it
     
    sissy, Sep 1, 2017
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  15. poobs

    poobs

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    I should have some sort of helmet with a Go- Pro Camera. LOL Now Im on the hunt for a square - rectangular type of plastic kitchen garbage pale to make a DIY Sieve. :) Sort of a proof of concept for my amount of flow etc.
     
    poobs, Sep 1, 2017
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  16. poobs

    sissy sissy

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    make sure it is heavy duty because ones I buy always crack after a year or 2
     
    sissy, Sep 1, 2017
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  17. poobs

    poobs

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    BUY ??? LOL :)
     
    poobs, Sep 2, 2017
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  18. poobs

    poobs

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    My fish are trained... sort of.
     

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    poobs, Sep 2, 2017
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  19. poobs

    poobs

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    Well, my UV is still working and is about two years old. I think it kills the algae but it leaves the dead algae to make some sort of foam. Been getting ready for Irma and haven't worked much on my Sieve. :(
     
    poobs, Sep 5, 2017
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  20. poobs

    sissy sissy

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    It may be lit but does not mean it is working .I have bulbs that light but they do nothing
     
    sissy, Sep 6, 2017
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