Culturing apparatus

An apparatus for growing and maintaining microorganisms or cells within a culturing chamber simultaneously heats and gasses a nutrient solution being delivered through the culturing chamber. The apparatus includes a pump for pumping the nutrient solution from a nutrient source through gas-diffusable tubing to a heating and gassing block. From the heating and gassing block, the nutrient solution is transported through the tubing to the culturing chamber. A heating source preferably delivers water at a predetermined temperature to fluid passages of a retention well in which the culturing chamber is maintained, and through the heating and gassing block such that the retention well and the heating and gassing block are kept essentially at the same temperature. Gas from a gas source is presented to the tubing through the heating and gassing block for diffusion through the tubing into the nutrient solution.