My 90gal is on top of my 40L cichlid tank, on a metal stand that's got to be pushing 20 years old. Never had a problem, and that's holding up something like a ton of water in our living room :-) Phil _______________________________________________ GSAS-Member mailing list GSAS-Member@thekrib.com http://lists.thekrib.com/mailman/listinfo/gsas-member