the plurality of growing trays 14 so as to inflate the space between the rigid or semi rigid transparent sheet 14 a and its corresponding gas permeable membrane 14 b because the gas permeable membrane 14 b allows the escape or infusion of co 2 into the nutrient enriched water 20 when under positive pressure the nutrient enriched water 20 is further enriched with co 2 during operation stated somewhat differently each of the plurality of growing trays 14 is composed of a rigid or semi rigid transparent plastic sheet 14 a having a pliable transparent gas permeable membrane 14 b affixed thereon as best shown in fig5 the rigid or semi rigid transparent plastic sheet 14 a and the pliable transparent gas permeable membrane 14 b affixed thereon define in the space between them an inflatable carbon dioxide gas chamber 17 the carbon dioxide gas infusion system 38 is fluidicly connected to each of the plurality of growing trays by way of tubing not shown for purposes of simplicity such that carbon dioxide gas is able to 1 inflate the carbon dioxide gas chamber 17 of each of the plurality of growing trays 14 and 2 diffuse into the nutrient enriched water 20 contained within each of the plurality of growing trays 14 each of the plurality of growing trays 14 generally also further comprises one or more glue lines positioned 37 along at least the outer edges of the pliable transparent gas permeable membrane 14 b and.