ʻO nā wili kila i uhi ʻia me ka corrosion kūpaʻa lōʻihi e kōkua i ka hoʻolōʻihi ʻana i ke kaʻina hana ʻōpala i ke ola pūnāwai.
Hana ʻia me nā ʻōwili kila puna wai hoʻomaʻamaʻa wela me nā cones alumini e hōʻoia i ka hana kaumaha loa.