Some of us use clear acrylic as dividers. People that use mirrors for short periods at a time because they believe that the mirror will bring out the colors and have the fish more aggressive. They also use the mirrors for short periods at at time because it might stress the fish. However, wouldn't the see thru acylic be the same as a mirror all of the time? What's the difference between using a mirror and having acrylic dividers since the acrylic is like using a mirror all and because using a mirror stresses the fish, wouldn't the fish with clear dividers be stressful all of the time. When I first got my 2 ZZ's, they would try to attack each other but it seems like they got smart and realize that the can't get to each other thru the dividers. They still sometimes try to get at each other but not as much anymore, Ed?