FishAreFriendsNotFood10
Fish Herder
maybe when theres no RO store near you? or you prefer to do everything at home and just go to your lfs for fish and corals make sure your on a water BILL not METER as when you plumb these things in they are something like 96% waste water and 4% RO pure water. I travel about 10 miles a month for my RO water i have 3 big 25litre drums (cost me about £20 for 2, 3rd was free lol) and it costs me £6 to fill em up. then i just mix the salt at home in a 30 litre plastic container with spare heater and powerhead