Abstract: A pool-side, unplumbed, solar powered treatment system configured to monitor pool water and selectively introduce a plurality of different chemicals through individual pumps and feed lines to a return line to the pool. The present treatment system uses oxidation reduction potential, ORP, as a surrogate for chlorine/bromine/other oxidizer and pH probes to monitor water quality in real time and dispense appropriate amounts of chemicals to maintain a predetermined chemistry in a pool. The system introduces the chemicals into filtered pool water through a venturi or eductor.