Current Working System
HERE IS WHAT MAKES IT ALL HAPPEN:
Detail view of the tube supports:
DETAILS ON THE 12 INCH TUBE:
The bottom tube is 12 inches in diameter. It is 10 feet long with 5 supports. Empty it holds 40 gallons of water. With gravel in it holds 30 gallons of water. To fill this tube with dry gravel it takes 560 pounds of gravel. Wet weight of gravel and water when filled is 720 pounds. There is 5 square feet of total growing space in this tube.