Ke koho nei i ka wai palekana no ka waiū waiū pēpē? Hoʻohālikelike kēia alakaʻi i ka wai piula wai, ka wai hānai, a me ka wai i kānana ʻia. Manaʻo ʻia kahi mea hoʻomaʻemaʻe wai kiʻekiʻe (e laʻa, ka ʻōnaehana RO) e wehe pono i nā mea haumia e like me nā metala kaumaha a me nā kemika, e hōʻoiaʻiʻo ana i ka palekana no nā pēpē.