a water dispenser that is works as a filter. it has layers of soils and stones and you can see it. what is it?

Question

it about the size of a regular 5 gallon water dispenser but it filters the water through these layers of soil and stones and things like that. the lady who has one (i saw it at her house while visiting a friend) is a yoga junkie and she told me its the same filtration system used by buddhist. but it looks really nice and i would love to find out the name of it or where to get one..
please help!

Answer 1

sounds like some kind of earth filter. they make them for swimming pools. you could try calling a water softener company,a pool dealer or just google earth or soil filter.