The Under Current® is the worlds first recirculating Water Culture Hydroponic System featuring our Patented Sub-Current Culture® Method. This innovative application circulates literally hundreds of gallons of solution per hour beneath plant roots. The Under Current® supercharges the solution with dissolved oxygen, creating a hyper aerobic condition. All Current Culture Systems now come with white ABS lids. These new white lids are made of durable ABS plastic, are UV stable, 100% non-translucent and highly reflective. New side-entry air ports on all Current Culture Under Current® system now include an innovative side-entry for the air diffuser lines utilizing a uni-seal for each module. This allows you to remove the entire module lid without disconnecting the air lines, making root-zone inspection much easier. Includes: 8 gallon multi mod growth modules with drain well, 25 in center 5.5 in heavy duty white lids with port hole, 5.5 in heavy duty net pots, easy clean manifolds with UC spin-tight bulkheads, add-back kit, high flow aeration manifold, air pump bank with air flow regulator, premium linear Air Pump(s), Danner Mag-Drive return pump with 1 in return hose, adjustable float valve with reservoir adapter kit, optional drain out kit available, and Cultured Solutions XS Growers Pack. 16 site has a 9 ft 4.5 in x 10 ft 1.5 in grow area, 24 site has a 9 ft 4.5 in x 14 ft 3.5 in grow area and 32 site has a 9 ft 4.5 in x 18 ft 5.5 in grow area. These items are drop ship only.