Biosand Filtration

[@sergevisseron]

très bon système et ingénieux je l'adopte pour l'eau de pluie merci pour le réalisateur

[@IWH8023]

Amazing graphics, some of the presenters sound 12.

[@peterpiper5300]

hi. is it necessary that you drill small holes on the pipe thats at the bottom? wouldn't water still enter the opening of the pipe?

[@Mini_Wolf.]

Thanks for the video, it was really helpful

[@lindaawotwe-williams5159]

Hi Anthony