Planted Tank Guru
Join Date: Nov 2005
Location: Saint Joseph, Illinois
My acrylic got a little too warm when I was gone for a few days and my brother forgot to turn off the light, and started to sag a little. I am not sure if plexiglass would fare any better, its barely noticeable anyway. If you are using an under water return or you keep your tank reasonably full I wouldn't worry about it. In my case, I use a power filter, I see no need for canisters. I guess I just "haven't seen the light" yet. My point with the power filters though, is that a few drops will err up to the light and might make it on the bulb. As long as the power filter is situated on the side of the aquarium that the end of the bulb faces, a few errant drops won't hurt the bulb. Just make sure the socket is on the opposite side of the filter and any powerheads, though. I haven't shorted a bulb yet, and don't see it happening anytime in my lifetime.