Here is an aquarium light stand I printed. It was designed for the light to be on a track, that can move easily. Light fixture is sturdy but moves well enough that you can move it in the middle. I printed at .4mm with a .5m nozzle. The way the objects are orented on the print job makes the lines on the on the track lock in place with the pivotable support base. So when you move it you can feel them rubbing against each other but provides a nice click in place for a snug fit. I have also included the first design that doesn't have the track so if you want a stand but don't care for the track. Print the no_track. Also, When I printed this for some reason one of the support columns was .5 mm larger. So print support1 and support2 if you want a snug fit. The holder was designed to be 2" above the tank. I didn't include bigger ones but just push/pull the support stl's if you want a higher height. See the no_track picture. It technically looks better to me but Its just not as cool..