We are in the stages of having an ecological house built in the Dorgoge and are looking at 'natural' pool options. Apart from salt water pools and ionisation wired pools (no chemicals), we also need to know how the naturally filtered plant pools work. These have the plants in a separate pool that filter the water into the swimming area. Once again no chemicals are used. Is there anybody out there who has personal experience of this kind of pool - how effective they are long term - pros and cons etc? Whilst information is available on various websites,only the 'pros' are highlighted of course. Any information greatly appreciated.