Sorry, is it 24 tall or 18 tall? At only 3 feet long, you may not need a brace at 18" tall.

I wouldn't bother with a center brace at 18" tall either.
I have 2 - 48" long tanks that are both 20" high that don't have any bracing other than the standard black trim. No problems with either one.

I'm running a custom tank with 3/8" of glass that is 36x20x20 an i dont have a slight bow in there. I have a friend that has been making tanks for years and he tells em that on a 3/8 anything over 20 " you will need a center brace.

mike

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Sorry, it 36 long x 18 deep x 24 tall. Will a 6 inch center brace be enough?

I'd start filling it and see if it bows. There isn't any danger doing this for testing. I had a 4" tank that lost it's brace in the middle of the night. The tank bowed out about 2.5" front and back and was fine for a day until I repaired it. So you could fill yours, see if it bows more than an 1/8" or so, if not, skip the brace.
If you're not comfy with that, then yes, a 6" brace would be fine.

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Cool, I'll brace it just to be safe. This just saved me about $100. :biggrin:

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Do I get a commission? :razz:

Or buy some glass and make the eurobracing yourself too.

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LOL!

Jon, I don't really like the look of euro bracing for some reason. I must be the exception. :confused:

OK I have never bought a new tank in my life, so what the hell is euro bracing?