1/4" plexi thick enough to not bow?

[Kabong]

Im trying to do a plexiglass lid for my 50gal
36" X 18" with a 8" glass brace in the middle.
I want to do it with 2 sheets, So about two 18" X 18" squares.
192watts of PC over top
So the question is will 1/4" plexiglass bow? Or will it be thick enough not to?

 

[CompNrdCR]

Mine is a little bit less the 1/2 half inch 8"x14" sheet. I think and it bows due to heat...

Try 3/4"

 

[CB1]

Yes it will bow. I have a 9" x 10" 1/4 " thick pice on my sump with no light and it bowed.

 

[Psyire]

Why do you want to cover it?

 

[Kabong]

<a href=showthread.php?s=&postid=6820684#post6820684 target=_blank>Originally posted</a> by Psyire
Why do you want to cover it?

I've got jumpers
Its for my FW tank that has rainbows. Who get a little exuberant at feeding time and my Dojo loach who's already gone carpet surfing once.
I'm starting to think it'll just be easier to go with egg-crate though.

 

[integlikewhoa]

yea it will bow. 1/4 is to thin.

 

[manderx]

it bows from absorbing water on one side. if you really want to use acrylic, you could just flip it every few days so it absorbs water evenly.