AquaUrban Sleek Aquaponics Grow Bed - Bell Siphon Includes Media Guard and a Bell Siphon, plus all the fittings At 12" deep, 28" wide and 44" long, you'll have approximately 8 sq ft of growing space. thick food safe plastic that doesn't bow under the heat or weight of outdoor aquaponic gardening. No skimping on quality, hand built, U.S. manufacturing