Acceptable Bow on a 225 Acrylic?

my tank is 72x30dx24h it is 3/4 acrylic and there is NO bowing at all with my tank.i do know that some of the thinner acrylic will bow. that would scare me bowing like that.
 
3/4 on the tank is the way to go the bow will stress the seams eventually causing them to craze and fail. Just how long is anyones guess. My 180 is a clarity tank and is only 3/8 it also deflects pretty good as well, I am in the process of replacing it as well
 
sabodish - that's funny! I already have a 92 gallon corner tank and the bow in that tank makes things a little distorted. I was looking forward to a flat tank again ... NOT!


I am going to refill the tank again this weekend to take photo's to share with Clarity Plus and see what they say about it ... and get it in writing as well.
 
im guessing they wont give you anything in writing. your best bet would be to try and build some type of brace for the top of the tank.
 
What is there to brace????
The only place where it needs support is dead center of the veiwing pane.
The top is the thickest acrylic, the rest is 1/2'
the seams are fine.
 
Ya gotta remember that most tank mfrs build tanks to hold water, not to hold water within a certain set of parameters (deflection, optical distortion, etc.), and definitely not to allow for the Wavebox, so to one of them - the deflection *is* normal. Hey - it holds water doesn't it? well that's what it's supposed to do. I'm not saying anything about any particular mfr here BTW (so lawyers keep away :) ) Getting something in writing, esp on a used tank, would be highly improbable and certainly not covering secondary expenses or incidental damage.
I don't see any way to brace it any more as the joints are good and the top isn't cracked. Personally, I'd start looking around, it may hold water, but for a nice display - just isn't good enough IMHO esp if it makes you nervous just looking at it. If they say it's fine - don't worry, ask them what they'd give you for it, *I'd* be curious.
HTH,
James
 
clarity has a tendancy to Under-engineer their tanks to stay competative...any tank over 24" made w/.5" acrylic will bow..3/4" is preffered for "No Bow"

trying to restict the bow is the worse thing u can do...tank will pop at the seem...

if a joint is going u can see heavy crazing and white parts in the joint where the panes are seperating and if the tank is not perfectly level the euro brace will crack..

good luck
 
Thanks everyone for your feedback and guidance. I got back from Vegas last evening and can finally see the tank for myself. It does bow quite a bit like Biodragen described. I think I'll start shopping around for a new tank and maybe use this one for a sump.

Sara
 
Now I'm worried about my Clarity 120g I bought like 5yrs ago and never setup yet. It's 3/8.........
 
Update:

I visited the LFS where this tank was purchased and they were very helpful. Clarity Plus is going to come over to look at the tank next week. The tanks lifetime warranty was voided due to the closed loop not being drilled by them, but hopefully we can work something out on a replacement tank ... 3/4" this time.
 
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