Backyard Aquaponics
A place to discuss aquaponics

That's a difficult issue. I wonder if you could add a stainless steel strip to the inside to hold it flat?

I'm using a piece of aluminum "angle iron" and will mount it vertically through all the bolts. It should be enough to keep it from bowing. Unfortunately, when I took the window out, I found it was badly cracked so I'm waiting for a new one to arrive.

Oh ugh, tell me this isn't isn't the way life works all too often? Smart on the aluminum angle bracket.