amazing!!! bad luck for us in so. cal. it's not allowed or else i would have done a mini-type one. i'm shock that tyson doesn't do any water change and only rain replaces it. well, come to think of it they are in tropical weather that gets a lot of sun. here in so. cal. too much sun and no rain. but come to think of it.. it is possible to have no water change and just have an outdoor pool like tyson's one. and maybe add some sprinkler to do an artificial rain using aged water with pump. that's seems to be a good idea...
going back... it's one awesome set up!!!