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  1. #1
    Senior Member wend121's Avatar
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    Reducing the flow in a Bio Cube

    I bought a used 14 gallon Oceanic bio cube that I plan on keeping seahorses in and I am being told that the flow is too much. It has a 140gph submersible pump built into it and I'm wondering if anyone has ever tried to remove the pump and replace it? if so, how do you do that? I don't have the instruction manual and I didn't put it together so I'm lost on how I need to do this.

    I was also thinking of just putting a timer on it so its not on all day...but I'm not sure if that will fix the problem since when its on its still too much flow.

    Any ideas?

  2. #2
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    140gph is not a lot of flow.

    There is different types of flow. Direct flow is usually never good. You want flow that spreads real wide.

    You can replace the pump with a Marineland Mini-Jet 606. It has adjustable flow from 82gph - 153gph. Another idea is to split the flow with some extra 1/2" loc-line and 1/2" loc-line splitter.
    29g Biocube, 2x90w Aqua Illumination LED light modules, Vortech MP20, Sapphire BC29 skimmer, GHL Profilux Plus II with 3pump doser.

  3. #3
    Senior Member wend121's Avatar
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    Okay....how do I replace the pump though? Do I have to empty out the tank first and then just pull the pump out? I tried pulling it last night gently as it's really hard to see in the back of the tank but it didnt' move...do you twist it or?????? I wish I had an instructions manual

  4. #4
    Senior Member wend121's Avatar
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    split the flow with some extra 1/2" loc-line and 1/2" loc-line splitter....can you explain this?

  5. #5
    Senior Member wend121's Avatar
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    when you say split the flow you mean like what this person did?

    http://www.nano-reef.com/forums/inde...=128484&st=140
    scroll down and you will see his full tank picture

  6. #6
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    You need a 1/2" Y fitting:
    http://www.jlaquatics.com/product/pl...g+Fitting.html

    6" of 1/2" loc line:
    http://www.jlaquatics.com/product/pl...22+Length.html

    Another 1/2" flare nozzle
    http://www.jlaquatics.com/product/pl...e+Fitting.html

    To replace the pump you stick your hand in chamber #3 grab the pump and pull up hard. The suction cups will disconnect.
    29g Biocube, 2x90w Aqua Illumination LED light modules, Vortech MP20, Sapphire BC29 skimmer, GHL Profilux Plus II with 3pump doser.

  7. #7
    Senior Member wend121's Avatar
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    So I don't need chamber 3 to be empty to remove the pump?

  8. #8
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    Deafgoose is the nano man :b2:
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  9. #9
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    Quote Originally Posted by wend121 View Post
    So I don't need chamber 3 to be empty to remove the pump?
    You should only have the return pump and tube that connects to the 90 degree fitting in the 3rd chamber.

    Disconnect the 90 and pull the pump strait up.
    29g Biocube, 2x90w Aqua Illumination LED light modules, Vortech MP20, Sapphire BC29 skimmer, GHL Profilux Plus II with 3pump doser.

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