Hi - I am new to this forum. I live in Sydney Australia. I have been following the conversations along this topic for a good reason. I have been moved to post this as my family & I have moved into a newly built 'eco' community of approx 20 homes of varying sizes & types. The developer is a part time developer, part time 'greenie' but unfortunately has a passion for anything that doesn't use 'chemicals'. As part of the community facilities we are to have a pool built which is currently in 'construction' - fibreglass 11.8 m x 4m x 1.2-1.9 deep. He has selected an 'Enviroswim' ES3 Ioniser System as a sanitiser & combined with a basic cartridge filter. My fear is I can't find any believable scientific or practical evident to support the efficacy of this system used on its own without chlorine. None of the State Governments here support this system. In fact they see it at best as an algaecide only used in conjunction with chlorine. Unfortunately like the US the governments have no jurisdiction over private pools. He has quoted a test carried out by a NATA accredited laboratory in northern NSW but it seems to have some large 'gaps' & inconsistencies aside from the fact that it was commissioned by the manufacturer of the ES3. I would like some feed back if possible if for no other reason than just a sanity check as I have been attempting to highlight the shortcomings in his selection to our community to no avail. I do fear that the proposed pool will not be safe for my family & I to swim in with this system. Thanks for any feedback or assistance.