Never seen it. I'm a little concerned though. Glass only needs to be supported on edges, but acrylic needs to be supported on its entire surface. As the acrylic ages and becomes brittle, I'm not so sure it will be able to hold the weight of the water.enchanted said:I was just cleaning the 29 Gallon I obtained used. I hadn't cleaned it yet and now that I have I found the bottom of the tank is Frosted Plexiglass?
Anyone ever seen this before?