ʻO ka hoʻopaʻa pono ʻana i kāu lako loko wai ke kī e hōʻoia ai i kahi ʻōnaehana hana kiʻekiʻe.ʻO ke kūʻai ʻana i kahi ʻōnaehana kānana hewa ʻole hiki ke alakaʻi i nā pilikia he nui ma ke ala no kāu loko.

ʻO ka mua, e nānā i ka nui o kou ʻauʻau i nā galani.Inā ʻaʻole ʻoe i helu mua i kēia, e haʻi wale mai iā mākou i ka nui o kou loko wai me ka lōʻihi, ka laula, ka hohonu, a me nā ʻano hoʻi, ka poepoe, ʻāpana ʻehā a oval paha.

Me ka nui o ka loko i loko o nā galani, ʻo ka mea aʻe e koho i ka kānana nui kūpono a me ka pauma pili.ʻO ka mea maʻamau, manaʻo mākou he 5 mau hola i kēlā me kēia pōʻai kānana no kāu wai puna he maʻamau no ke koho ʻana i ka ʻōnaehana kānana.Akā ʻaʻole maikaʻi ke kūʻai ʻana i kahi kānana nui iki.Hiki ke ʻoi aku ka maikaʻi a me ka ikaika o kahi kānana nui ma mua o ka nui maoli e pono ai kāu loko.E lawe i kahi laʻana e wehewehe pono ai:

     ʻO ka nui o kā mākou loko SP5512Bl he 26.61 cubic mika, kā mākou kānana injected-tank 1025 me 450W pump he koho kūpono.No ka holo kahe o 1025 kānana ʻōnaehana he 8.5 cubic mika i kēlā me kēia hola, ʻo ke kumu: 26.61/8.5=3.13 hola, ʻo ia hoʻi he 3 mau hola wale nō e hoʻopau ai i kahi pōʻai kānana no ka loko me 1025 kānana.Pono kēlā.