:bounce:Darn Zoo, and I get accused of my replies being long winded. It is not rocket science to build stand. An all glass tank could be easily support by as little as a 3/4" square piece of pine or spruce at each corner if you could keep the pieces upright. Lumber has huge amounts of strength under compression loads. That is why a commercial stand is generally just made of a plywood or particle board box with a 3/4' inch gluing strip in each inside corner. Two by four frames are gross over builds, but they are easy to build and are very forgiving of errors and therefore safe. Using water proof glue (resicorinal) and screws is best. Do not use pressure treated lumber. Try to use only plywood with exterior grade glues. Coat all inside surfaces with several coats of spar varnish, polyurethane, or epoxy paint. No stand of any length supporting an all glass tank needs center legs. A all glass tank can be entirely supported by its four corners. An acrylic tank however needs a smooth surface under its entire bottom so center legs would be useful as it would allow for a smaller depth crossbar running from side to side of your tank. Look at a quality kitchen cabinet. It would make a wonderful tank stand if it came in the right size. Styrofoam or closed cell foam on top of your tank stand is great. It should only be 1/4" thick. And yes try to build things square and level. But glass is also pretty forgiving an strong. There are a whole lot of tanks sitting on floors that are not level, and on stands that are not square or level. It is all a matter of degree. You should be more concerned about what size load your floor can handle than being as wound up as Zoo's write up has probably gotten you. No offense to carpenters, but standard stick frame carpentry is grossly over built and was designed so that the framing members would be close to gether to allow for the flimsy materials that would span across them, not because the number of framing members is needed to hold the expected loads. Most house loads would allow framing members be 8 to 12 feet apart. :twocents: