In the past I have used Sleeping bags to insulate tanks. They are the perfect size for a 55. By using two sleeping bags and a air pump I kept my fish alive for four days without power. KWB _________________________________________________________________ [1]All-in-one security and maintenance for your PC. Get a free 90-day trial! References 1. http://g.msn.com/8HMBENUS/2752??PS=47575 _______________________________________________ GSAS-Member mailing list GSAS-Member@thekrib.com http://lists.thekrib.com/mailman/listinfo/gsas-member