He whakamahinga nui rawa hoki mō ngā pūtōki kohiti iti i roto i ngā take rata, nō reira he taurangi e whai ake ana i te whanonga o ēnei pū. Ko ētahi atu wai, pērā i te wai horoi tapu, ngā toto whakamutu, me ētahi atu reiti whakamatau, ka taea e ēnei pū. Ka whai ēnei wai i te whanonga ki ngā rōpū haumanu, pērā i te mahi o te tahuri i te kōkōngā me ngā rongoā, te whakapae i ngā whatu, ko te hanga hoko i ngā whakamātau rorohiko. Kua hangaia ēnei pū hei whakatupu i te wai i te wehenga paunga, e iti i te matekai me te whakawehenga i te kawe mai i te rongoā, ka taea e ia te tiaki i te haumaru o te tangata. He mea hōhonu hoki ngā rau o ngā pū nei, ka pai ai ki ngā paerewa o te rata, ka taea e ia te tiaki i ngā wai rata i roto i ēnei pū, kāore i te whakarerekē i te haumaru.