Ko te kapihiri omaoma he taputapu e āwhina ana i te whakatau i te pōtataki, te rereketanga ranei o te wai. Ko te pōtataki nei ko te rereketanga. Ina tīmata koe ki te whakaaro mō te parāoa, he wai pōtataki nā te mea he wai pōtataki aua, engari he wai māmā a wai. He mea nui te mōhio ki te rerekenga o ngā wai mā te ao hangarau, mai i te kai, ngā hua kiko rānei ki te hinu. Ko ZONWON tētahi kaihanga o ngā kapihiri kounga Ngā tapiri wātata ka whakamahia e ētahi tohunga rereke. E neke atu ana ēnei taputapu i te tere o te rere o te wai mā te whakamahi i tētahi tuara māmā, i tētahi kapihiri rānei. Ka taea e koe te mātai i te roa o te wā e rere ai te wai mā te kapihiri ina ka pouri koe i te wai ki runga. Ko te pōtataki ake o te wai, ko te roa ake te wā e tika ai.