He hua tātari whānui te mowhiti tātari koiora uku quartz, e whakamahia whānuitia ana i roto i te pūnaha tātari koiora. Ko tana mahi hei "horoi" i roto i te pūnaha wai ka taea te whakapai ake i te kounga o te wai me te whai hua, ā, he āhuatanga tino pai hoki e pā ana ki te rere o te wai, te whakapai ake i te PH o te wai, te pumau o te ihirangi hāora me ētahi atu. Ka whai wāhi katoa ēnei ki te whakapai ake i te PH o te wai, te pumau o te ihirangi hāora, ā, ka angitu te whakahoki i te wai ki tōna āhua mārama taketake.