The present invention relates to the art of making the required liquid out of various liquids like water of ponds, lakes, marshes, the rivers, life waste water and
industrial water, rain water, underground water,
urine, sea water,
aqueduct water, improving the quality of these waters to a required level that allows them to be discharged, and used for growing plants and breeding fishes and shells, and to a higher lever allowing them to be drunk while providing good health to the
human body, wherein the liquid to be processed will be improved both by the filtering step for passing the liquid through the filtering material and the magnetic process for passing the liquid through the
magnetic field and wherein the said liquid will be refluxed to the said filtering material and / or to the reserving part for reserving the said liquid upon being processed and also relates to the method of improving the quality of liquid and its device, whereby, during the said
reflux, the said liquid is to be sprayed upon being processed for improvement.