how do you build your tanks?

Discussion in 'Anything DIY Related' started by brettb2020, 7 Jul 2010.

  1. brettb2020

    brettb2020

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    so reading through the net and speaking to people it seems that there are two ways to assemble a tank.

    Either: the sides are on top of the base.
    [​IMG]

    Or: the base is cut slightly smaller and fits on the inside. the side panes are then stuck to the side of the base.
    [​IMG]

    how do you prefer to build your tanks?

    speaking from an engineers point of view, and I do stand to be corrected but the allowable shear stress of materials is normally lower than the allowable tensile stress. putting the sides on top is putting the silicone into shear. any comments on this?
     
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  3. butcherman

    butcherman Moderator MASA Contributor

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    option A
     
  4. Dane

    Dane

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    I've only ever seen A....
     
  5. neo

    neo

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    person who build my tank prefers A for smaller tanks and B for bigger ones, what the cutoff is for small and big i dont know.
     
  6. brettb2020

    brettb2020 Thread Starter

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    A seems to be the most popular...
     
  7. brettb2020

    brettb2020 Thread Starter

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    interesting, so yours is B?
     
  8. brettb2020

    brettb2020 Thread Starter

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    actually, i think everyone should post how there tank is built too. see which is the most popular.
     
  9. Singularity

    Singularity Hmmm amper!

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    option B looks nicer, my tank is like that.
     
  10. neo

    neo

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    mine is A, i stand corrected but i think when he goes over 2m he will use B, he also uses spacers to create a gap when building bigger tanks with option A - reduce the amount of silicone pushed out due to weight of side panes.
     
  11. neo

    neo

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    when i say spacers it is very thin, like thin needles.
     
  12. scubaninja

    scubaninja

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    Option A

    But you already know my opinion here :) For the size tanks the average joe has, it doesnt matter :) But i do like how easy it was to build the B tank of yours Brett. Very clean. So anything i do in future will be Option B.
     
  13. lIghty

    lIghty

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    Most common is A. Option B is called "Floating base" and in normally reserved for large tanks, so that weight of the upper structure doesn't rest on the base glass.
    Posted via Mobile Device
     
  14. FransSny

    FransSny

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    with lIghty on this , normally A but B is easier and neater as scuba said, but I have built both designs on small (less than 1,2 mtr x 600 h ) and bigger (2 mtr x 700 h) to no ill effect, there are also other factors to take into consideration ie bracing system used , glass thickness etc etc
     
  15. RiaanP

    RiaanP Moderator

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    My tank and sump is B

    Just get your dimensions right, and B is easier to build.

    BTW all Idol Marine big tanks are B.

    For example tanks like Schaun "My dream in the making". The side panels are extremely heavy. Also being rimless, and thus thicker. On Option A, you end up with all this extra weight all around the edge of the base glass. With B, the side panels weight lies directly on the stand. And base then only carries weight of sand, rock and water.
     
  16. LuckyFish

    LuckyFish MASA Contributor

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    All tanks in Germany are build in option B. It is the stronger option.
    The silicon can handle with option more force. It is similar like taking a magnet of the steel. Pulling it back is more difficult than sliding it down.
    There are these flat snails in the rockpools. Pulling them off doesn't work, but hitting them sideways does. It was very surprising to see that here in SA the tanks are build in option A. This option was new to me. On top off that, the glass thickness been used are thinner than what we use overseas. The thinner the glass the easier the silicon comes off when using option A.
    For the very same reason, the longer side pane has to be glued against the shorter ones!
     
  17. RiaanP

    RiaanP Moderator

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    That sounds logical, but it will look crap...:)
     
  18. LuckyFish

    LuckyFish MASA Contributor

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    No it doesn't because almost all tanks are glued with black silicone!
     
  19. dallasg

    dallasg Moderator MASA Contributor

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    Well said luckyfish.
    My tanks are option B and the dropoff neil and I are building is option B
    Posted via Mobile Device
     
  20. LuckyFish

    LuckyFish MASA Contributor

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    Yes Dallas, all tanks should be build like that. Would save newbies a lot of trouble with
    used tank made in A-style.
    A drop off tank can be build in B-style only.
    Otherwise there will be more drops off. Off the floor!
    And Frans is right. It is so much easier to build a B-style tank.
    All tanks in Germany come with thin paper under the bottom.
    You put the base on the paper, put silicone around the edges and press the sides against the base. Once everything is dry, the paper gets cut around the glass.
    They glue it on a huge table and the sides laying around the base.
    They use silicone guns that work with compressed air.
     
    Last edited: 7 Jul 2010
  21. Pistolshrimp

    Pistolshrimp

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    Wow i didnt even know tanks built using the 'B' method, learn something new everyday
     
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