Carbondioxide is taken up by an injector system. Bubbles of carbondioxide which have not been used are circulated by a gas/water separator and are injected into the reaction chamber again. In this way not a single bubble can leave the reactor without having been used. Up to now, the remaining gases, mostly nitrogen, have caused problems in every closed reactor, thus complicated and delicate degasing procedures have been necessary. The Jetstream reactors are the first which make use of this gas in a profitable way: It has a beneficial effect on the water flowing through the coralsand thus preventing the system to accumulate fine mud. The whole filling is evenly dissolved. As a result the speed of current in the system is enhanced remarkably without diminishing the solubility for carbondioxide. The outlet water is free of gas. Everyone can compare and test the capacities, the results are reproducable - Jetstream reactors are the first ones with performance diagrams!