Don know if this old news or not, but anyway. I decided to silicone glass strips I cut to support the acrylic dividers in my sump. I do know that the silicone to acrylic bond is not very strong, but silicone and glass bond is very strong. This should make me sleep at night better knowing my sump wont come apart. If your wondering why I did not make my baffles from glass, its all about cost. The thinner glass was cheap and easy to cut. I DIY'ed my baffles from acrylic. I did purchase some 1/4 inch black to block out refugium light to other parts of the sump. The second strip is for the bubble trap, will stick another glass piece on it to support acrylic piece going in the trap.