Clean water with a residual bacteriostat is a proven component of achieving optimum production and controlling plant mortality/soft rot
Water volume depends on soil/media drainage capacity and evapo-transpiration. Plant stress may arise from too much or too little water.
In semi hydroponic situations much greater quantities of clean/treated water with added residual are required
Ground level drippers (e.g. T-Tape® or pressure compensated drip lines) conserve water and provide more uniform watering