upper and lower volume portions in communication hydrochloric acid filling the lower portion electrode means having an anode and a cathode each at least partially immersed in the lower portion for conducting a current through the hydrochloric acid so that at least chlorine gas is freed thereby and manifold means for conveying the chlorine gas into the flow so that a bacteriacidal solution is formed in accord with another embodiment of this invention a method of safely conditioning water in a swimming pool is disclosed comprising the steps of circulating pool water through a filtration system electrolyzing dilute hydrochloric acid in response to the circulation collecting chlorine gas generated by the electrolysis and siphoning the chlorine gas into the flow so that the pool water is thereby disinfected and ph adjusted the foregoing and other objects features and advantages of this invention will be apparent from the following more particular description of the preferred embodiments of the invention as illustrated in the accompanying drawings referring to fig1 a schematic view of a swimming pool conditioning system is shown generally by reference number 10 the conditioning system 10 is installed to treat the water in a swimming pool 12 the conditioning system 10 is connected in parallel with the flow through the pool 12 created by a pump 14 the pump.