An apparatus for continuous growth and production of a product substance is disclosed. The apparatus comprises at least one input unit for receiving at least one starting material, wherein the starting material is one of at least an aquatic organism; at least one growing unit for continuous aquatic growth of the at least one starting material to produce at least a culture; at least one buffering unit for accumulating and upholding at least a portion of the culture grown in the at least one growing unit, wherein the buffering unit is configured to balance between demand and supply of a product substance produces by the system; at least one nozzle for delivery of the demanded fraction of the upheld portion of the culture as the product substance; and a control unit connected to the at least one input unit, the at least one growing unit, the at least one buffering unit, wherein the control unit is configured to control the operation of the apparatus to ensure that the grown culture meets predefined environmental conditions.