Ukukhetha amanzi aphephile ebhodleleni lobisi lwengane? Lo mhlahlandlela uqhathanisa impompi, indawo yokugcina izingane, namanzi ahlungiwe. Kunconywa umshini wokuhlanza amanzi osezingeni eliphezulu (isib. uhlelo lwe-RO) ukuze ususe ngempumelelo ukungcola okufana nezinsimbi ezisindayo namakhemikhali, okuqinisekisa ukuphepha kwezinsana.