Perspex and Glass

Discussion in 'Anything DIY Related' started by VicZA, 25 Aug 2013.

  1. VicZA

    VicZA

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    Hey All !

    I want a black coast-to-coast overflow on my 1.2 m tank, so I thought I would use 5mm black ASB plastic (acrylic) for this purpose.

    Will this work ? Mostly worried about how to secure the perspex/plastic to the glass as I have read a few people saying that silicone does not work .... is that true?
     
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  3. 459b

    459b Moderator MASA Contributor

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    Why do you want to use Perspex?
    Glass will be easier to get hold of and muche easier to stick to your tank. If you want it black, then I'd rather use glass and cover it with thin abs plastic sheeting.
     
  4. VicZA

    VicZA Thread Starter

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    How do you secure the ABS sheeting to the glass ? And also can the glass cutters cut thin strips (20mm wide) of glass to manufacture the return and overflow chamber (see pic below)

    Overflow box detail.jpg
     
  5. 459b

    459b Moderator MASA Contributor

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    You can attach it with silicone sealer, seeing as its not structural it doesn't have to be a perfect stick.
    They should be able to cut glass that thin
     
  6. VicZA

    VicZA Thread Starter

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    Think I will have to re-think my overflow and sump ... seems glass is a more long-lasting solution than perspex (and cheaper).

    Will 6mm glass be enough for the overflow sheets (large one stuck to the back glass, narrower one on the base glass) ?

    Was thinking of using 8mm glass (20mm wide) for all the spacers and supports - what do you think?
     
    Last edited: 25 Aug 2013
  7. VicZA

    VicZA Thread Starter

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    Also, what "height" should the bottom chamber (the one that sits on the base) be ? I suppose there will be some sort of pressure from the pump pushing on the glass in the return chambers ....
     
  8. RiaanP

    RiaanP Moderator

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    If I were you, I would let somebody who have a lot of experience building tanks, build it for you. All you know you read up in the last 2 or 3 weeks. No disrespect to you. But the problem comes in that you only will know if there is a design flaw once the system is up and running. You got no reference points to be able to evaluate your own design. Not saying that it will not work. But how do you know that you do not have a design issue.

    But if you want to do the build yourself. Good luck. It is an interesting challenge.
     
  9. VicZA

    VicZA Thread Starter

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    What's life but a set of challenges ... and what's knowledge without questions .... naaaa .... I will build it :thumbup:
     
  10. VicZA

    VicZA Thread Starter

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    For anyone that actually owns one of these overflow designs or who has ever built one ... how to you safeguard against this glass (indicated in the pic as 6mm glass). I assume that a rock could dislodge or move and come crashing down on this glass causing it to break .... no ?

    Overflow detail 04.jpg
     
  11. Hammerhead

    Hammerhead

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    Use the same glass thickness as the main tank as they will also be subjet to pressure and may snap, bow etc. So basically if tank is built out of 10mm use 10mm on the overflows as well.
     
  12. Lord_Blackadder

    Lord_Blackadder

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    If something gets stuck in that bottom area you'll never get it out.
     
  13. Hammerhead

    Hammerhead

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    Idol tanks are designed this way, the need for overflow combs is a must on these setups.
     
  14. Lord_Blackadder

    Lord_Blackadder

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    I think it's gimmicky and a waste of glass to be honest.
     
  15. VicZA

    VicZA Thread Starter

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    ... suppose it depends what you want from your tank ;)
     
  16. VicZA

    VicZA Thread Starter

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    What does the comb achieve ... and how ?
     
  17. Hammerhead

    Hammerhead

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    It is i suppose.

    prevents fish from going over the edge, l_l_l_l_l_l_l_l_l_l_l

    Check out FS: overflow combs.
     
  18. VicZA

    VicZA Thread Starter

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    Thanks
     
  19. Hammerhead

    Hammerhead

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    Can u post a pic of the bulkhead you using, as im looking for those skinny overflow bulkheads.
     
  20. VicZA

    VicZA Thread Starter

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    Just at the work at the moment ... when I get home a bit later ... ok ?
     
  21. VicZA

    VicZA Thread Starter

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    @Hammerhead

    I struggled to find decent tank connectors and eventually found these in a "Farm City" store here in Nelspruit. The return one is perfect but the overflow one is a little small ... but will work. At least both of them have a reasonably small "lip" (5mm). Hope this helps

    Bulkheads.jpg
     
    Last edited by a moderator: 26 Nov 2015
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