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Thread: Too much Flow?

  1. #1
    Senior Member nbreau's Avatar
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    Too much Flow?

    Is there any specific rule as to the max/min amount of flow you should have in a tank ? I've currently got 3 maxijet 1200's and one maxijet 900 and i'm wondering if this may be too much.

    Nick.
    ======================
    sold the 77gallon back in 2005, looking to setup a nano

  2. #2
    Senior Member Flame*Angel's Avatar
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    Depends on the critters. If you have LPS corals you don't need much circulation at all. I believe softies like a little more but still not much. If you keep SPS you pretty much can't have too much circulation. Clams don't like any. Fish seem to love lots of currents.

    Your three 1200s and one 900 wouldn't be too much for SPS but if you have bubble corals or euphelia (frogspawn, torch, hammer) they won't like that much at all.
    Susan

  3. #3
    Senior Member Toooloud's Avatar
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    Some like aroun 8 - 10 times the total water volume..

    myself i run at around 15 times .. im running around 2 thousand GPH..

    And i keep Acros, monits, LSP ( Hammers and bubbles) and softies

  4. #4
    Senior Member ALRHA's Avatar
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    you can always put the SPS in the stonger flow areas, and others out of the way.
    Albert
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  5. #5
    Senior Member Flame*Angel's Avatar
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    True, I should have mentioned that low flow zones can be created with rockwork and/or positioning of powerheads.
    Susan

  6. #6
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    Think of the force of an ocean wave coming in to a reef. Stuff near the surface gets pounded pretty hard and stuff deeper get subjected to huge back and forth currents. I doubt you could over circulate your tank but you do have to direct the current so it is not pointed directly at any of your corals. As forcefull as an ocean wave is ... its force is defused as it moves through and around the rock on the reef. The corals do not often get subjected to the direct force of this Hugh amount of moving water. They tend to be somewhat shielded by the rocks they grow on or create. Their also not right at the surface. So a LOT of strong circulation near and at the surface BUT above your corals is a good way to go. The fish will like it and spend a far amount of their time up there where they can be seen and feed while your corals benefit from a high gas exchange and hugh water movement.
    Rob

  7. #7
    Senior Member nbreau's Avatar
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    awesome post.. thanks.
    ======================
    sold the 77gallon back in 2005, looking to setup a nano

  8. #8
    Senior Member Flame*Angel's Avatar
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    Salty Dog - excellent points!
    Susan

  9. #9
    Senior Member ALRHA's Avatar
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    i actually have mine low in the tank a facing diagonal to the surface. the basically give a nice current right across the entire tank (not too powerful b/c its a STREAM) and bring the bottom water to the surface while also breaking up the surface tension - great for gas exchange.
    Albert
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  10. #10
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    Yes ALRHA that is also a GOOD point. We need to bring water up from the bottom of the tank. The deeper the tank the more important it is. On the open reef or reef/shore line the waves would do that when leave the shoreline or as they pass over the reef.
    Rob

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