I bought water from Ocean's in Motion. I received a 500g refill once a month (some times every other month). The water was good, you can look up some of my old tank photos/build threads from when I was in LA if there are any questions in regards to water quality. It was much cheaper overall than mixing water and going through filters. They delivered to my home, my water storage tank was in the backyard probably about 75 yards from the street and he ran a fire hose to fill it.