I love this!! I have well water and live in the south, so that means iron in the ground... lots of it. The soil is orange and well water, untreated is orange too... I've filled my hot tub twice and on both occasions used my 'connections' at the local fire department to truck out city water (thinking it was cleaner). Well, the first time this worked well, but the hassle of coordinating time and getting the truck here wasn't ideal. The second time, I forgot to 'flush' the fire engine storage tank and got dirty water (pain the neck to clean, took a week)...I decided to give this product a try... I hooked it to my garden hose and after flushing the unit a bit (highly suggest you do so as there will be discolored water from the carbon within) water began to flow crystal clear!!! I was totally surprised and I really didn't expect it to work so well...The device seems to be nearly identical (only bigger) to the water filtration systems hikers use to get potable water from nasty, stagnant lakes and ponds...My only criticism, is on my unit, despite the rubber seal being 'in place' it still leaked a bit of water out the side with the hose connection... not a big deal in my use, but if this was being used indoors for some purpose, that could leave a mess...