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#1
03-14-2012, 02:44 AM
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with the 2' x 2' base I'd say 20" tall with a decent euro brace is fine but probably as big as you'd want to go. It's not really the seams you have to worry about or the tank holding together. If the glass is too thin it will bow/budge causing distortion which can be really annoying.
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#2
03-14-2012, 03:59 AM
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Euro brace and inside brace the bottom and you should be fine. I have seen a 55g fresh water system of 5mm and it was like 5 years old. Just don't cheap out on the silicone as the sandwich joint between your edges will not be very thick. Also I would run your long sides about 3mm past the edges of your short sides so you can create a double joint and seal the inside corner as well as the outside corner.
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#3
03-14-2012, 04:20 AM
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5mm? Are you sure its not 6mm/1/4"?
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#4
03-14-2012, 04:53 AM
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#5
03-14-2012, 05:05 AM
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i do have two 4' sheets that look to be 6mm/1/4" (barely thinner if u ask me) but are only 14"h and in pretty rough shape if i need to use those somewhere?
i just dont have access to a larger tank in my area, cant afford to get to calgary/vancouver for one without a payment plan, and i have lots of glass. my id sharks just need a bigger tank! i am still in need of a 90g or so for a nice reef DT tho if any one can help....
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#6
03-14-2012, 05:07 AM
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5mm=3/16"
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#7
03-14-2012, 06:52 AM
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I haven't read through all the responses ...
5mm isn't that thin. I have an Aqueon 36g bowfront that isn't any different. Only difference is the, I think, tempered face. And if it's not, then it's really strong for such thin glass. Oh, BTW, yesterday I had to remove 2 baffles in my sump. They were 6mm - 17-1/4 x 16-3/4. I couldn't cut them out, so I tried taping them and WHACK with a wrecker bar edge. No go after many tries. I eventually had to score the panes and then smack them hard enough to hurt my ears. So, my point is, your 5mm can take a lot
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#8
03-14-2012, 08:32 PM
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+1. It could be 3/16" though.
__________________
 My 70 Gallon build: http://www.canreef.com/vbulletin/showthread.php?t=66478 My Mandarin Paradise: http://www.canreef.com/vbulletin/showthread.php?t=72762 I wonder... does anyone care enough to read signatures if you make them really small? I would not. I would probably moan and complain, read three words and swear once or twice. But since you made it this far, please rate my builds. 
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#9
03-14-2012, 08:40 PM
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check out this link:
http://www.theaquatools.com/building-your-aquarium you can change your safety index to whatever you feel is "safe". IF it's tempered you can usually go a little thinner than non tempered, as you see with most store bought tanks.
__________________
My 150 In Wall Build
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#10
03-14-2012, 09:12 PM
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Hybrid Mode
