Share Your Flow Secrets

Discussion in 'Equipment' started by MolaMola, Aug 9, 2018.

  1. MolaMola

    MolaMola Supporting Member

    Joined:
    Dec 16, 2014
    Messages:
    709
    Likes Received:
    221
    While hopefully coming out of dealing with various tank challenges, I am taking the opportunity to change some of the basic setup. I think I need to increase or at least redirect the flow in all of my tanks, since I seem to have dead spots and junk that easily builds up on my sandbed - detritus, cyano, plating sand, everything.
    What are tips or resources people looking into this topic can check out for how to get some good, nonlinear current going? I have 3 tank shapes that I think require different circulation: regular box (4'x 2' x 21"), bookshelf/landscape (3' x 1' x 1'), cube (20"). I am having trouble figuring out how to get the flow bouncing off the walls AND moving vertically I wish I could drop in some colored dust and see where it goes, like the first time I poured Alk solution in front of a powerhead.
    Also, I recently got to see a member's tank (@Bruce Spiegelman ) that had a swell in part of the tank that I really loved. Totally looked like the ocean.
    What do people like/dislike about their flow?
     
  2. Bruce Spiegelman

    Bruce Spiegelman BOD

    Joined:
    Mar 12, 2016
    Messages:
    3,000
    Likes Received:
    1,122
    You don't need colored dust. Microbubbles work. :)
     
  3. Flagg37

    Flagg37 Colorado member

    Joined:
    Nov 29, 2015
    Messages:
    3,452
    Likes Received:
    922
    Or just put a whole handful of food (pellets) in. :) jk

    I started with a pump on either side with a mirror program running. That worked decent but what was even better was when I put both pumps on one side a few inches from the top to create a gyre. I was able to run them with identical programming and because they were close to the top I could bump up the power and not worry about the sand getting kicked up. This also allowed for a good amount of surface agitation. Plus the acros on top like a lot of flow.
     
  4. Kremis

    Kremis Supporting Member

    Joined:
    Oct 27, 2016
    Messages:
    573
    Likes Received:
    112
    I spent hours making my flow perfect so that the anemones get this amount, zoas get this, other patch of zoas get that, torches get this, sps get high flow etc. I mostly used bubbles to see where the flow was going (put bubbles beneath powerheads so air woudl get sucked in)
    However, I had mostly converted my tank from sps to zoas/lps, so I had to model the flow around the tank. if possible, it is a lot less work to set up the flow and put corals based on where the flow is (lps in low flow, sps in high, etc)
     
  5. xcaret

    xcaret Supporting Member

    Joined:
    Feb 21, 2008
    Messages:
    4,259
    Likes Received:
    298
    I’m running out of time to have the tank running but I had in mind going like the Cal Academy, core some rocks, put PVC pipe in there, four outlets and do a closed loop without drilling the tank, just using one of the drains to feed the pump. I guess by reading some of the forums, a Gyre is a simple solution. If you don’t like seeing many pumps in or outside the tank, perhaps using some behind rockwork to solve dead or very slow flow pockets
     
  6. rygh

    rygh Supporting Member

    Joined:
    Jun 29, 2010
    Messages:
    4,342
    Likes Received:
    677
    Two powerheads on each end, right near the surface, pointing almost, but not quite, at each other.
    Always on.
    I get a ton of very strong linear surface flow of course, but that is above everything.
    Below, in the tank, it ends up being two gyres, one on each end, but a lot of extra
    random motion as the collisions change.
     
  7. Bruce Spiegelman

    Bruce Spiegelman BOD

    Joined:
    Mar 12, 2016
    Messages:
    3,000
    Likes Received:
    1,122
    I used to spend a lot of time moving around rocks and Vortechs. Sometimes adding another Vortech, playing with different modes, etc. Then I just got a Gyre and don't do any of that anymore. No need.
     
  8. Ibn

    Ibn Supporting Member

    Joined:
    Feb 20, 2007
    Messages:
    4,580
    Likes Received:
    505
    Similar to Mark. Two gyres pointing at each other, always on, and crashing against each other. Return pump is COR-20 running it's own program and creating more random flow via RFG nozzles.
     
  9. Coral reefer

    Coral reefer President

    Joined:
    Mar 26, 2010
    Messages:
    7,673
    Likes Received:
    1,145
    Vortechs And bare bottom
     

Share This Page