In a message dated 6/22/02 3:54:19 AM Eastern Daylight Time, Aquatic-Plants-Owner at actwin_com writes: << Subject: dry land "donut" tank >> One thing about that set up. The center tank will have to be glued down or it will float up in the center with a surprising amount of force. I tried it once and silicone rubber wasn't strong enough to do the job. Moon