Ko te mīhini kōiro tuhinga i waenganui i te wai he whakamārama nui i te hanganga o te ao tuhinga, e hononga ana i te whakatutuki iwi me te pai o te mahi tuhinga. Ki te tuhinga kōiro, kei reira te tino hiranga me te tino whakapau ki te whakarite, ko ngā mīhini kōiro tuhinga i waenganui i te wai ka puta hei whakaaetanga tētahi rerekē ki ngā taunga whakarere i waenganui i ngā pūngao. Ko te hanga o te mīhini kōiro tuhinga i waenganui i te wai e āhei ana i te wai hei kaiwhakarite utu, e whakakapi ana i ngā pūngao matua (VOCs) e noho ai i ngā mīhini kotahi. Ka whakaiti tēnei whakakapi i te whiu i te whenua, e whakaiti ana i ngā hākiri haurangi i te wā o te tuhinga me te wā o te tahuri. E tika ana enei mīhini ki ngā ture whakatutuki iwi i ēnei wā, me aha ka pai hei whakaaro mō ngā tuhituhi e hiahia ana ki te whakapai i ō rātau tohu iwi. Ahakoa te wai hei kaiwhakarite, ka kore te mīhini kōiro tuhinga i waenganui i te wai ki te whakawehewe i te pai o te tuhinga. Ka taea e ia te whai i te pai o te whero me te whai i te whānui o te whero, e āhei ana ki te whakahoki i ngā whero pai me ngā whero tika. Kei roto i ngā mīhini nei ngā pango iti iti e whakarite ana, e whakarite ana hoki i ngā pūtake matua, e āhei ana ki te whakahokia o te mīhini ki runga i te papa kōiro tuhinga me te whakatakoto ki runga i te papa whakamahi. Ki te tuhia i runga i te kākano, i te kāri, rānei i ngā karu pāka, ka taea e ēnei mīhini te whakaputa i ngā tuhinga pai me ngā tuhinga tika me te whakapai i te whero i runga i ngā tuhinga nui. He tino whakahē ki te whakatauhia i te wā o te tahuri mō ngā mīhini i waenganui i te wai. Noho atu te wai i te wā o te whakarite i te wā o ngā pūngao matua, me ngā momo tahuri tūpato. Ko ngā raraunga kōiro tuhinga moenga mīhini i waenganui i te wai ka whakauru hoki i ngā raraunga tahuri tūpato, pērā i ngā tahuri irahere me ngā tahuri huarere pai, hei whakakaha i te tahuri o te wai me te whakaae kia tae te tahuri o te mīhini. Ka whakatakotoria ēnei raraunga ki te whakakore i ngā take pērā i te whakapākehake rānei ko te tahuri kore pai, me te whakapai i te mana o te kōwhiringa tuhita. Ko te mīhini kōiro tuhinga i waenganui i te wai ka taea e ia te whakapai i ngā hāpai ki ngā papa whakamahi rerekē. Ko ngā pūtake mīhini e āhei ana ki te whakapai i te hāpai ki ngā momo rerekē, e whakamahia ana ki te whakatū haerenga me te whakatū tūpono, e whakapai ana i te whakatutuki me te whakapai i te whiu i te wai me te whiu i te pūngao. Ko tēnei ka pai hei whakamahi mō ngā momo whakamahi nui, mai i te whakapakoko mea ki te whakapakoko tuhinga matua. Ahakoa te whakanuitia o te whakapae mō ngā whakapakoko whakatutuki, ka whakaaetia tonu te mīhini kōiro tuhinga i waenganui i te wai i ēnei wā i waenganui i te kai me te wai, i te kai me te wai, me te whakapae iwi.