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  1. #1
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    Question Building a Overflow box ?

    Just got a bunch of free Acrylic from my work
    and I plan on using it to build a Overflow for a 30 gallon tank i have pieces that i think are 1/8 and 1/4 thick

    Q: What thickness is best for the overflow box

    Q: What dimensions should i make the box and what
    size PVC should i use 1/2 inch or 1 inch ?

    The sump will be a 20 gallon tank if that makes a difference

    Thanks

    Tanker

  2. #2
    liv
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    Former Moderator liv's Avatar
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    i'd go 1/4" for the thinkness of the acrylic.
    the box size depends on where its located.. if its at the back.. you could make it very long but very narrow to skim more surface area. when you are talking about pvc.. i dont understand where that all fits ? you should drill 2 holes for the overflow and attach two bulkheads in it. thats how i would do it.

  3. #3
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    I guess i should have been a little more clear sorry
    I am building a Weir overflow box for a tank that isn't drilled ( i don't plan on drilling the tank )

    What i meant by the PVC size was the hole for the outer
    box of the over flow leading to the sump.

    thanks

    Tanker

  4. #4
    liv
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    ah ok.. the weir is usually done by cutting a U shape in the glass and attaching a box to the tank. in that case I would go with a glass overflow box so it bonbs to the glass tank better. for the pvc sizes.. i would go for 2x 1" as a minimum for the drain.

  5. #5
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    This may give you a better idea of what i am going to build. It doesn't involve any cutting of the tank.
    http://home.satx.rr.com/cvonseggern/images/overflow.jpg

  6. #6
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    Ah...Siphon overflow.

  7. #7
    liv
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    siphon overflow
    its ok.. but i'm not a great fan.. it requires too much attention in my mind.
    I think you should go for a weir or simply drill the tank.

  8. #8
    Moderator mike536's Avatar
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    I agree drilling the tank is much less stress on the head. Always thinking "what if the siphon breaks" Just imagine how much water would be in your livingroom. Very easy to drill a tank yourself. Or even easier get someone to drill it for you. I don't know who drills in your area. I know Liv has been known to drill a tank or two. I don't know how close he is to you. And he's got a good record too. He only broke 8 out of the 10 tank he drilled!!!LOLOLOLOL


    Just joking LIV. I've heard nothing but good things.
    Cheers,
    Mike Philpott

  9. #9
    liv
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    LOL.. ouch.. to set the record straight, I only snapped one.. and it was my own 6gallon tanks.. and it was all my fault.. lost patience...LOL

    but like Mike says, you can get the bits and do it yourself or use a dremel with a diamond bit if your going with a weir setup..

    BTW, i run a Weir and I absolutely love it.. the main thing i like is that its exterior and doesn't take out any space inside the tank. its also easy to clean and tweak.. no lights in the way...etc.

    but drilling is the safest ( against floods ).. your siphon overflow is very prone to floods.. scary stuff in my mind. ( having to add water in it all the time and having to worry about power outages )

  10. #10
    Senior Member reefsurfer's Avatar
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    Your getting sound advice here from the guys. Siphon overflows are NOT the way to go.

    Tanks are stressfull enough as it is, you dont need one of these siphon jobies to make it even more stressfull.

    Dont do it dont do it
    PLEASE SEND ALL ACROPORA FRAGS TO THE REEFSURFER

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