30" tall acrylic thickness???

[FishNCash]

I have a 72x27x31 on 5/8" thickness. The only bowing is the top. Other than that the tank looks good.

 

[johnny potatoes]

To a point you are correct, However since acrylic behaves differently than glass it doesn't hold entirely true. Acrylic and continue to bow and even stretch whereas glass will simply break when pushed beyond its limits. The length of the panel thus is very important as the longer the panel the more opportunity for flex/stretch. This is somewhat addressed with support bracing such as doing a rim.

Actually I tend to agree with you, I was only repeating what I've read. It doesn't make sense to me but I never did study physics. That being said if I was buying a tank with one inch acrylic I'd go up to 36" in height. If your paying for the thicker material might as well get the most out of it.

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[softturtle]

The tank builder has been very up front about everything and has dealt with my pestering well. He will build the tank out of any thickness I want... 3/4" is standard. Being the skeptic I am, I just wanted to see what others had to say about this subject. He said has tanks 20+ yrs old, built out of 3/4" that are still strong as day one with little to no bow in the 8' panels. "You'd have to use a straight edge to notice it" were his words. Decisions...

 

[Dieselhybrid]

Go 3/4 and reinforce the joints with weld 40. Cheaper than 1" and nearly as strong. . Just a another option.

My 3/4 " 450 is crazing in the panels and seams at 1.5 years old. I'm buying another large tank and transferring fishes then reinforcing with the tip and pour method Wednesday13 describes in his thread. Doing this ASAP to maximize tank life. Spent thousands on the setup and had it shipped 1000 miles. No way I'm letting it age prematurely and risk a blowout. I'd go 1" or reinforce 3/4" and never worry about it again.

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