"Keep close to Nature's heart... and break clear away, once in awhile, and climb a mountain or spend a week in the woods. Wash your spirit clean." John Muir We, at Ponds & Plants, just finished up an exciting project at the Tennessee Aquarium. We built a 20' x 30' seepage waterfall out of 7 tons of black lava rock. Next time you visit the aquarium please take a moment to enjoy, it's right in front of the butterfly house. You might think black lava rock is easy to come by but