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Thread: MH Canopy

  1. #1
    Senior Member nbreau's Avatar
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    MH Canopy

    Hi All,

    I'm looking at building a MH canopy this weekend and was wondering if anybody can tell me if I should worry about tank overheating and if the lights need to be a minimum distance from the water.

    If Heating could be a potential problem what should i look into in terms of fans ?

  2. #2
    Senior Member tang_man_montreal's Avatar
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    What size tank?
    How many bulbs?
    175w or 250w?

    Ideally, you want your MH bulbs AT A MINIMUM 6" off the water, and allowing clearance over the bulb for heat issues.
    MH's get HOT!

    You want air circulation, which means fans pushing air into the canopy. Ideally, a partially open back to expel hot air from the bulbs.

    Take for example, my canopy on my 90 gallon tank.
    The canopy stands a whopping 18" tall, and the 2 x 250w MH bulbs are 9" from the water surface.
    I have 2 x 4" fans pushing air into the canopy, and the top back of the canopy is open.
    To top that off, I have a fan inside the canopy (hanging in the middle), pushing air onto the water to help reduce water temperature through evaporation.

    Hope that helps.

  3. #3
    Senior Member nbreau's Avatar
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    Hi,

    The two bulbs will be 400w 20K radiums. The tank will be a 77 gallon 48" long.

    Do you have any good DIY canopy instructions ? My only concern is how many fans will I have to add and will I have to wire them (I'm the furthest thing from an electrician)

    Will noise be a concern with the fans ? The tank will be next to my couch facing the TV.


    On a positive note my appartment gets very cold in the winter so hopefully this will help with heating my livingroom

    Nick.

  4. #4
    Senior Member tang_man_montreal's Avatar
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    There are several good plans on the 'net.
    I based mine on several ideas.

    If you have visio, I can send you a copy of the plans I used for mine.

    I used 4" Orion fans, available from www.alliedelec.com ... They are quiet and have many options you can buy for them (cables, dust guards, etc...)

    Wiring isn't that hard.

  5. #5
    Senior Member nbreau's Avatar
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    I actually do have visio... you can send the plans to nkbreau@nbnet.nb.ca or post them here....

    you could also save the visio doc as a GIF or JPG I think.....

  6. #6
    Senior Member tang_man_montreal's Avatar
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    Here's the GIF version... I had it saved, didn't remember.



    My Canopy design

  7. #7
    Senior Member nbreau's Avatar
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    wow, nice... got any pics of the final product ?

  8. #8
    Senior Member nbreau's Avatar
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    wow, that canopy is really cool... what are the dimensions of the tank and does it open both using the doors in the front and lifting the front wall ? Maybe i'll use these plans when i build my canopy thursday..... would love to see some finished pics first

  9. #9
    Senior Member tang_man_montreal's Avatar
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    Thanks.

    I designed it using several ideas I got from the 'net.

    I originally designed it to have the doors on the front, and also have the complete front lift out for MAJOR access to the tank. I was sick of being obstructed, and having to remove my old canopy.

    In the end though, I didn't use the doors, since I wanted professional doors, but couldn't get them black or unpainted. I may modify the canopy one day to incorporate those doors as it would make it easier for feedings.
    As it stands right now, I lift the whole front out. The front is mounted on 2 x 24" brass piano hinges.

    Here's a picture showing the canopy itself. I used molding all around the canopy to hide the screws.
    Attached Thumbnails Attached Thumbnails MH Canopy-dscn0450-small-.jpg  

  10. #10
    Senior Member tang_man_montreal's Avatar
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    As for lights...

    There are 2 NO 40w mounted on the front door, and another 2 NO 40w mounted within the canopy with the 2 MH's.

    I painted the inside of the canopy white, and then lined it with reflective mylar throughout.

    I have pictures of the canopy with the door open somewhere.. I'm looking for them now.

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