1. Huakita iri tere: hoahoa whakakai-mowhiti, he pai te hāora rewa.
2. He pai te hydrophilicity: He nui te waahi ahurea microporous, he tere te whakakapi i te wai, he tiketike te mahi koiora, he pai te painga o te wai.
3. Ehara i te mea ngawari ki te pupuhi: te pupuhi teitei o te wera, te iti o te rahi, te taimaha marama, te hanganga pakari, kaore i te ngawari ki te pakaru.
4. Rauemi tātari kupapa: He pumau te kounga o te wai i roto i te pH, a ehara i te mea ngawari ki te pa ki te rerekee o te tinana wai.5. Te kaha o te whakauru: te kaha o te wai me te kaha o te whakauru.