The BioTherm TOOB™ is a revolutionary, efficient method of increasing the dissolved oxygen (DO) content of irrigation water, significantly improving plant health and productivity. The TOOB has an inlet for water, and another for pure oxygen (from an optional BioTherm O2GEN oxygen generator, or oxygen tanks from a commercial source). Oxygen enters the TOOB through long strands of a proprietary hollow “mass transfer” fiber. The O2 molecules are forced though microscopic holes in the fiber into the surrounding water, supersaturating it with dissolved oxygen. The oxygen remains in stable suspension throughout the irrigation process.