Irregularly-shaped rimless acrylic tank build - The Planted Tank Forum
 
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post #1 of 2 (permalink) Old 05-24-2017, 10:28 PM Thread Starter
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Irregularly-shaped rimless acrylic tank build

Hi all, been lurking for a while, looking to start planning my build and I had questions about what thickness of acrylic I would need to use to achieve a relatively safe rimless design.

I've seen all the calculators and have put in similar dimensions for what I've got in mind, but here's my problem: I'm planning a hexagonal build, with the front and rear panels being elongated relative to the two other faces on either end, making the front and rear panel shorter than the overall length. Many (all?) of the calculators only deal with rectangular builds, but the project I'm cooking up works much better as an elongated hexagonal prism/octahedron shape.

The height would be 21"and the water level an inch less, with the front and rear panels roughly 30" long, and the two panels on either end being 10-14" wide. I was thinking 1/2" (12mm) cast acrylic would be sufficient without bracing, but I was talking to the owner of a local aquarium supply store and he recommended 3/4", or to put triangular corner braces in all the 120 corners on the top edge if I decided to use 1/2".

Does anyone have a good resource to solve this, or know of a more definitive answer?

Thanks,
Jay

Bump: I should mention that I'm not at all worried about the cuts, lengths, and miter angles being off; my uncle has pro-grade everything in his shop (where I'd be building the tank) and he's a cabinet-maker by trade.
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post #2 of 2 (permalink) Old 05-26-2017, 08:28 PM
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I don't have experience with building tanks so take this with a grain of salt, but I have done some research myself. 1/2" should be fine, but I would overbuild if possible/you can afford to, just to be certain. Volume, and water height to a lesser degree, is the greatest determining factor for thickness. Anything over 17" high should be at least 1/2" thick. Keep in mind that that is based on tight right angles - even if you cut your hex angles perfectly, the water pressure will be intensified on the outermost "peaks" of your design. I would strongly recommend corner braces at the very least.

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