• Bhurashi redziva rinogona kudzivirira chikero(Mvura yemadziva inotora zvimedu kubva kumhepo yekunze, yobva yadzika pasi, yopedzisira yaita zvidimbu zvemafirimu emuyera)/ kudzivirira mavara(Matavi edziva anowanzo musanganiswa wespores, mabhakitiriya, tsvina, zvicherwa. , maoiri kana kubva kuzvinhu zvidiki zvesimbi mudziva)/ kudzivirira algae(Algae inogona kuwana nzvimbo yakagadzirira yechikafu chine guruva uye kumisikidza kumira kwakasimba mumvura ine tsvina yedziva) uye kudzivirira kudonha.