• Hiki i ka pulupulu wai ke pale i ka unahi (Ho'omohu ka wai o loko i nā ʻāpana mai ka lewa waho, a laila e noho i lalo, i ka hope e kūkulu ʻia ma ke ʻano he ʻāpana kiʻi ʻoniʻoni)/ pale i nā ʻeleʻele (He hui pinepine nā ʻili o ka loko i nā spores, bacteria, lepo, minerala. , nā aila a i ʻole nā ​​mea metala liʻiliʻi i loko o ka loko wai)/ pale i nā algae(Hiki i ka Algae ke loaʻa kahi kumu mākaukau o ka meaʻai lepo a hoʻokumu i kahi paʻa paʻa i ka wai puna wai lepo) a pale i ka etching.