Rimless Acrylic tank - The Planted Tank Forum
 
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post #1 of 12 (permalink) Old 03-02-2011, 06:30 PM Thread Starter
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Rimless Acrylic tank

I am ordering cell cast acrylic to build my own tank, but I am wondering if I should buy 3/8 or 1/4?
Size will be 40x14x18
100$ a sheet difference between the 2 sizes
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post #2 of 12 (permalink) Old 03-02-2011, 06:34 PM
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40" is a pretty long run. You're probably going to want the thicker stuff. 1/4" seems pretty thin.
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post #3 of 12 (permalink) Old 03-02-2011, 06:52 PM
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Acrylic isn't a good material for a rimless tank. Acrylic creeps under load, so without a rim to restrain the upper edge, it would gradually bow outwards over the months of use. Glass doesn't creep under load, except extremely slowly, over 10's or 100's of years. That enables us to use rimless glass tanks.

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post #4 of 12 (permalink) Old 03-02-2011, 08:13 PM Thread Starter
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Do you think the whole idea should be avoided or do I just need to make some sort of a top for it. With acrylic I have the tools I need. Glass I would just have to buy a complete tank.
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post #5 of 12 (permalink) Old 03-02-2011, 08:54 PM
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You could get the same look as rimless if you are good with acrylic. Have a perimeter of acrylic attached to the top of the tank for reinforcement. I think some tank makers call it euro-bracing?
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post #6 of 12 (permalink) Old 03-02-2011, 10:00 PM Thread Starter
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Would that include a center brace you think?
I plan on having a friend cut all my parts out on a Cnc router. That is why I want Acrylic so much. With glass I will have to pay to have them cut. I dont even mind spending 300 for a tank but then I have to pay to have it shipped from somewhere, and that gets to be too much. So I kind of feel like this is my best shot.
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post #7 of 12 (permalink) Old 03-02-2011, 10:13 PM
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i have a truvu tank, 55gal, the acrylic used is 1/4" but it has a top

when i make acrylic rimless cubes, i stick to 11x11x11 for 1/4". even 12" all around bows out noticeably

if u want a rimless your size, you definitely need thicker acrylic which gets expensive fast
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post #8 of 12 (permalink) Old 03-03-2011, 01:04 AM
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Euro bracing would work fine. That's what it is used for.

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post #9 of 12 (permalink) Old 03-03-2011, 02:07 AM
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there's a guy on ebay, macilwu, that makes rimless acrylic tanks, he makes them pretty freaking thick to avoid the dreaded bowing... also, in my experience, acrylic tanks take a bit of skill to put together nice. nice thing about glass, if you screw up, you can start over...
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post #10 of 12 (permalink) Old 03-03-2011, 05:37 PM Thread Starter
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I just got off the phone with my local glass cutter and the prices are more than reasonable to have glass cut and polished for what I want, but I am still not sure how thick? I would assume I would have to go 3/8 but that is going to be soooo heavy. I have to go 3/8 wouldnt I?
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post #11 of 12 (permalink) Old 03-03-2011, 07:14 PM
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You really can't beat the pricing of the already made rimless tanks... I think my 48 was like 250 out the door..
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post #12 of 12 (permalink) Old 03-03-2011, 08:32 PM Thread Starter
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send me a link
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