Ko te rere tonu o te wai hou, kua tātarihia ma te punaha tātari toru (waowa whakahohe, kapia whakawhiti katote, me te papanga kore-whatu) e akiaki ana i nga mokai ki te inu ake, me te whakatairanga i to ratau hauora katoa.Ka tātarihia te wai tohanga me te hāora, kia nui ake te hou.