Mirrored glass for sump?

[Chase31]

well just put the mirror on the outside would be my best guess

[Rogue951]

It's not for making a whole sump tank, it's for the partitions in a sump.

[Chase31]

i dont really think you should have to worry about it, but i dont know anything about it, i would go back and tell them they gave you mirrors instead of glass, they should give you the right thing