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Acrylic tank question

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Ok so the lady brought home the "75G tank" which actually turns out is the same size as my 55 g.... so its a 55 g.... anyway not to bad condition there are some scratches on it and it appears that the bracing on the top has some small cracks but still in tack.

I filled it with water outside to test it and the top seems to hold fine but there is obvious bowing in the middle of the front and back panes.... Is this normal for acrylic? Never owned one but assume since its plastic and bendable that it is normal with that kind of load. I cant get a measure meant but I would assume its about 1/4 " in the front and back enough to where I can see it when I look from the top.

Any input ?

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Updated 10-05-2010 at 01:05 AM by melev

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Questions - Need some input

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  1. melev's Avatar
    Yes, some deflection is normal. If you'd like to post some pictures, we can say for sure what is going on.
  2. trplxj's Avatar
    I would say that it's normal. I have a 500 gallon acrylic tank that is 32 inchs tall and it bows out probably 1/2 inch or so. It's been like that since day one and I've had it set up for about 4 years now. I would say that it's okay.
  3. Reefdaddy's Avatar
    Agreed, I have a 55 Acrylic as well and it bows slightly but nothing worry about. Order some Novus to rub out them scratches with, It was invaluable when I got my tank, it sounds like yours in the same condition as mine. The kit is only like 12 bucks.