Good advice, and I am kicking myself for not driving the extra distance to the lfs to get actual vinyl tubing; I used some white sch40 pvc to plumb part of my pump circuit but I've seen that used many times on aquariums without issue; Jeff Amman Amman Septic Designs, Inc. www.gotperk.com 360-794-7809 (Office) 425-501-5195 (Cell) 360-794-5408 (Fax) _______________________________________________ GSAS-Member mailing list GSAS-Member@thekrib.com http://lists.thekrib.com/mailman/listinfo/gsas-member