Replacing My Reef Tank Front Panel

[rq786]

You need a short wave UV light, Shine it on the edge of the glass, The side that looks whiter and hazy is the tin side

And you would want to have the whiter and hazy side to be outside of the tank correct

 

[Jaybrandnew]

And you would want to have the whiter and hazy side to be outside of the tank correct

That is correct