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  1. #1
    Senior Member GoSUV's Avatar
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    Closed loop vs. Tunze Stream

    I am planning a 180g in my new house. Currently debating within myself to whether go with closed loop circulation with a couple of SCWDs or just take the plunge and buy the Tunze Stream system. I haven't bought a tank yet but have a couple of quotes. A good Tunze Stream kit can cost up to $1k for the kind of flow I want, but with the cost of a couple of pumps, plumbing and the additional charge of drilling the tank, the closed loop option isn't far behind in terms of initial investment.

    Decisions, decisions.

    Closed loop pros:
    - no big ugly powerheads in the main tank
    - pumps can be upgraded/downgraded as needed
    - cheaper

    Closed loop cons:
    - need to drill the tank
    - cleaning the pumps can be tedious task
    - pumps and plumbing can leak

    Tunze Stream pros:
    - some wicked flow, but gentle
    - provision for more flexibility, i.e. photo sensor for slowing down the pumps at night, wave motion etc.
    - has feeding switch to stop the pumps temporarily

    Tunze Stream cons:
    - expensive!
    - big, ugly pumps in the tank, eye sore

    anyone has any opinion or experience on either to share, please do.
    If the authors of "Finding Nemo" knew anything about Clownfishes, Marlin would turn into a female and Nemo would become her new husband.

  2. #2
    Senior Member mouse6196's Avatar
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    I like closed loop. I have never had plumbing leak as I am extra diligent when doing it. With a quick disconnect on your return line, to take out the pump and clean it is no trouble. Besides, how often do you clean your pump. I only do it every 4 months or so. I still have yet to have a closed loop system though that I didn't have to drop a powerhead in on to fix dead spots. I just hide the powerheads in teh rockwork. Most of the deadspots are behind the rock anyways. Just my opinion...I would go with closed loop. It also gives you the options for sumps, refugiums etc that are all beneficial.

    That's my two cents worth...can I have my change!
    The only thing two reef keepers will agree on, is what the third reef keeper is doing wrong!

  3. #3
    Senior Member pt109's Avatar
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    GoSUV - You don't have to drill a tank for the closed loop. You can lay the pipe/hose over the top edge of the tank for both the intake and return. I currently have it installed this way on my 120g.
    Man cannot live on bread alone --
    He must also have his peanut butter

  4. #4
    Senior Member pt109's Avatar
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    Check out this link for further info on closed loops:

    http://www.advancedaquarist.com/issu...2003/short.htm
    Man cannot live on bread alone --
    He must also have his peanut butter

  5. #5
    Senior Member scuba steve's Avatar
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    Do you have some pics of yours pt109?
    stephen
    Stephen

  6. #6
    Senior Member tang_man_montreal's Avatar
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    You may wanna check this out as well:

    CLOSED LOOP SYSTEM WITHOUT A DRILLED TANK:
    http://www.sparklingfloorservice.com...losedloop.html
    I am Homer of BORG... Prepare to be..OOOO!! DONUT!!!!!!

  7. #7
    Senior Member
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    I think you win both ways. My personal taste is closed loop
    just because mostly of cost and having the big streams in there. they don't look bad after there covered in coralline but I believe you have to remove them once in awhile to clean as opposed to just shutting down a pump and cleaning it. I want no cords in my tank so I opt for the closed loop. I really don't go for that feeding function as I find the fish love it when the food is moving fast.[makes then work for there dinner ]

  8. #8
    Senior Member
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    Same here Johnny. The only cords going into my new tanks water will be for the heaters... and they will be in the sump system. I want this one to have the smallest amount of viewable equipment in the tank as is possible.

    Closed loop cons:
    - need to drill the tank
    - cleaning the pumps can be tedious task
    - pumps and plumbing can leak

    Power heads need cleaning too???
    Rob

  9. #9
    Senior Member pt109's Avatar
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    Scuba Steve - believe it or not, I just finished installing it last night. I don't own a digital camera yet, so we'll all have to wait til I finish the roll I started at MASO #7 and get them scanned in. My tank is set up like a peninsula - viewable from three sides. It's drilled on one end for the overflow. The closed loop also comes over the top. There are 4-3/4" outlets along each side and one outlet on the end. It's run from a Little Giant 4-MDQX-SC (1350 GPH @ 0' head).
    I'd say go for it - it's like 9 Hagen 301s going off at once (I might be exaggerating a tad - not biased at all) - but with no cords or powerheads visible.
    I haven't balanced the flow yet with reduction bushings, with the result that most of the flow is coming out the first 4 or 5 outlets. By zip-tying the PVC to the inside lip of the upper black trim, it's darn near undetectable.
    Man cannot live on bread alone --
    He must also have his peanut butter

  10. #10
    Senior Member scuba steve's Avatar
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    So you might get away with just drilling one hole in your tank, just for the overflow....
    hmmmm

    stephen
    Stephen

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