I have been using a metal frame Intex rectangular @ 500 gal pool for over a year, used for Madagascan cichlids.
And just picked up a rectangular Bestaway @ 1000 gal pool a few months ago, used for overwintering pond fish and water lilies in my basement.
The 500 gal

The Bestway 1000

The Intex seems to be more sturdy as far as frame, and thickness, but at least so far, I don't see a need to reinforce either with pond liner.
And just picked up a rectangular Bestaway @ 1000 gal pool a few months ago, used for overwintering pond fish and water lilies in my basement.
The 500 gal

The Bestway 1000

The Intex seems to be more sturdy as far as frame, and thickness, but at least so far, I don't see a need to reinforce either with pond liner.