The reason that I am using 4 x 4's for this particular stand is so that when I eventually get a house with a basement I'll be able to put 2 55 gallon tanks on it. But for right now I'll use it for grow out tanks at work. I will take your advice, however, and pull up the carpet to see which way the joists are going. If my tanks are not perpendicular to the joists, I will move them. Thank you so much for taking the time to advise me. Francine in MD Fish - photography - genealogy ________________________________________________________________ Get FREE voicemail, fax and email at http://voicemail.excite.com Talk online at http://voicechat.excite.com ------------------------------------------------------------------------- This is the apistogramma mailing list, apisto@listbox.com. For instructions on how to subscribe or unsubscribe or get help, email apisto-request@listbox.com. Search http://altavista.digital.com for "Apistogramma Mailing List Archives"!