Sticky Doc Bio Filter

Discussion in 'DIY - Do It Yourself' started by DrDave, Dec 5, 2009.

  1. DrDave

    damian

    Joined:
    Jun 7, 2011
    Messages:
    138
    Likes Received:
    1
    Location:
    Rochester Hills, MI
    oops, that was a crosspost.

    eta i will take your word for it, since yours works!
     
    damian, Jun 27, 2011
    1. Advertisements

  2. DrDave

    koidaddy karps house of koi

    Joined:
    Jan 31, 2010
    Messages:
    765
    Likes Received:
    12
    Location:
    Tampa Bay Florida
    Do you have a pic of the weir? How wide is the opening? As long as the flow from the weir into the pond is greater then the flow from the filter to the weir it should work. Probably twice the size outlet on the weir .
     
    koidaddy, Jun 27, 2011
    1. Advertisements

  3. DrDave

    koidaddy karps house of koi

    Joined:
    Jan 31, 2010
    Messages:
    765
    Likes Received:
    12
    Location:
    Tampa Bay Florida
    How much water will you be pumping? With my current setup(those two and a third) I could probable have them sit even height. The extra barrel slowed down flow through the mech/bio setup.
     
    koidaddy, Jun 27, 2011
  4. DrDave

    damian

    Joined:
    Jun 7, 2011
    Messages:
    138
    Likes Received:
    1
    Location:
    Rochester Hills, MI
    the pond will be 6000 gallons, and i'm targeting recyling once per hour.
     
    damian, Jun 27, 2011
  5. DrDave

    damian

    Joined:
    Jun 7, 2011
    Messages:
    138
    Likes Received:
    1
    Location:
    Rochester Hills, MI
    i don't have the weir yet. i wanted to nail the science down before i picked one because i noticed they have the bottom inlet, and for some reason i always thought you dumped into them from the top.
     
    damian, Jun 27, 2011
  6. DrDave

    koidaddy karps house of koi

    Joined:
    Jan 31, 2010
    Messages:
    765
    Likes Received:
    12
    Location:
    Tampa Bay Florida
    Ok, at 6000 gallons an hour your might have an issue. I am pumping @3500 gallons through mine. Worse case is you install a ball valve into the filter line that you can controll the flow into the filter and tee off the excess into a spray bay or other water feature..
     
    koidaddy, Jun 27, 2011
  7. DrDave

    DrDave Innovator Moderator

    Joined:
    Aug 29, 2007
    Messages:
    6,836
    Likes Received:
    85
    Location:
    Fallbrook, Ca USA
    As long as the waterfall weir is lower than the exit pipe from the doc filter, it will flow, it has to.
    Gravity 101
     
    DrDave, Jun 27, 2011
  8. DrDave

    damian

    Joined:
    Jun 7, 2011
    Messages:
    138
    Likes Received:
    1
    Location:
    Rochester Hills, MI
    Fluid dynamics are not that simplistic.
     
    damian, Jun 28, 2011
  9. DrDave

    BennyLava

    Joined:
    Sep 5, 2009
    Messages:
    246
    Likes Received:
    0
    Location:
    Dallas/Fort Worth area
    Nice. It is SO easy to build one of these filters. Thanks for doing the research and making things easy for the rest of us. It is much appreciated. Makes me wonder though... think something like this could ever be used for sewage?
     
    BennyLava, Jun 28, 2011
  10. DrDave

    damian

    Joined:
    Jun 7, 2011
    Messages:
    138
    Likes Received:
    1
    Location:
    Rochester Hills, MI
    i am looking forward to seeing mine in action!
     
    damian, Jun 28, 2011
  11. DrDave

    DrDave Innovator Moderator

    Joined:
    Aug 29, 2007
    Messages:
    6,836
    Likes Received:
    85
    Location:
    Fallbrook, Ca USA
    Fluid dynamics offers a systematic structure that underlies these practical disciplines, that embraces empirical and semi-empirical laws derived from flow measurement and used to solve practical problems. The solution to a fluid dynamics problem typically involves calculating various properties of the fluid, such as velocity, pressure, density, and temperature, as functions of space and time.

    Very little of this applies. Gravity prevails unless you are introducing a resistance in the waterfall weir, such as sub filters (which are not necessary). If the weir overflow is lower than the bio filter overflow, water will flow.
     
    DrDave, Jun 28, 2011
  12. DrDave

    damian

    Joined:
    Jun 7, 2011
    Messages:
    138
    Likes Received:
    1
    Location:
    Rochester Hills, MI
    maybe fluid mechanics is a better term. what i'm thinking about specifically is hydrostatic pressure, which is a term i forgot about until someone else pointed it out to me a few minutes ago.
     
    damian, Jun 28, 2011
  13. DrDave

    DrDave Innovator Moderator

    Joined:
    Aug 29, 2007
    Messages:
    6,836
    Likes Received:
    85
    Location:
    Fallbrook, Ca USA
    Do you understand how gravity works? What kind of answer are you looking for???
     
    DrDave, Jun 28, 2011
  14. DrDave

    ZmanArt007 Fish Keeper and Filmmaker

    Joined:
    Jun 21, 2009
    Messages:
    514
    Likes Received:
    233
    Location:
    Northeast Nebraska
    I believe Doc Dave is correct, but if you are that worked about it, just make the outlet of the doc filter even, or even above the top of the wier. You shud have no problems at all then.
     
    ZmanArt007, Jun 28, 2011
  15. DrDave

    damian

    Joined:
    Jun 7, 2011
    Messages:
    138
    Likes Received:
    1
    Location:
    Rochester Hills, MI
    wow what a jerk
     
    damian, Jun 28, 2011
  16. DrDave

    damian

    Joined:
    Jun 7, 2011
    Messages:
    138
    Likes Received:
    1
    Location:
    Rochester Hills, MI
    basically it turned out to be a hydrostatic pressure question after i looked around a bit, so now it makes sense. the pressure exerted by a vertical column of water is a function of its height, and once it starts going even just slightly, it creates a siphon effect that continues to pull the remainder.
     
    damian, Jun 28, 2011
  17. DrDave

    ZmanArt007 Fish Keeper and Filmmaker

    Joined:
    Jun 21, 2009
    Messages:
    514
    Likes Received:
    233
    Location:
    Northeast Nebraska
    ...
    ....
    .....
    You know he's a mod, right? He can easily ban you?
    .....
    ....
    ...
     
    ZmanArt007, Jun 28, 2011
  18. DrDave

    damian

    Joined:
    Jun 7, 2011
    Messages:
    138
    Likes Received:
    1
    Location:
    Rochester Hills, MI
    oh, i didn't realize being a mod came with the right to be condescending
     
    damian, Jun 28, 2011
    DaneDad likes this.
  19. DrDave

    ZmanArt007 Fish Keeper and Filmmaker

    Joined:
    Jun 21, 2009
    Messages:
    514
    Likes Received:
    233
    Location:
    Northeast Nebraska
    Right...
    Well I offered my opinion on the question, so now I think I'm done with the topic, and I don't want to get in an arguement.
     
    ZmanArt007, Jun 28, 2011
  20. DrDave

    koidaddy karps house of koi

    Joined:
    Jan 31, 2010
    Messages:
    765
    Likes Received:
    12
    Location:
    Tampa Bay Florida
    Maybe this is a job for Bill Nye.....................................the science guy. RIP
     
    koidaddy, Jun 28, 2011
    1. Advertisements

Ask a Question

Want to reply to this thread or ask your own question?

You'll need to choose a username for the site, which only take a couple of moments (here). After that, you can post your question and our members will help you out.