Hi Ken, I have used metal tank stands for years, the welded angle iron type, without any problems. I currently have a 45 tall (about 450 pounds) above a 30 gallon (330 pounds) sitting on the basement floor. You do have to watch out for "floor loading" if putting any large aquarium or "stacked" aquariums on wooden floors. The metal stands that seem to have problems are typically the "bolt together" or "knocked down" type that comes in boxes and you put together. Roy _______________________________________________ GSAS-Member mailing list GSAS-Member@thekrib.com http://lists.thekrib.com/mailman/listinfo/gsas-member