I've received a free used 50G tank (48") and stand (score!) but I have a question about the load limit of the stand. It's not a homebuild but doesn't seem to be of terribly high quality. The base is composed of a rectangle of 2x4s on the floor, broad side down, with a single 24" long 2x4 on each corner holding up the top of the stand, which is another open 2x4 rectangle. It has side panels, back panels and mid-length posts but they are not load bearing (I've removed the back panel and post to put in a sump). Looking closely it looks like the middle of the 48" spans sag very very slightly, in the middle the tank bottom doesn't contact the span but is raised by 1-2mm. Would anyone out there hesitate to put a 50G tank on such a stand? I'm going without a canopy, which should save some weight (lights will hang from the ceiling). It has been used as a freshwater tank before, so theoretically the stand is sound but before I pour a lot of water and money into it I'd like a second(third, etc...) opinion.