Question for the coast

[Aquattro]

Mike, very good point. For me to do a 20g water change, it costs about $7 for salt, RO water and power to mix the water.
To drive down to the dock, load 4 5g jugs in my boat and travel to where the water is actually clean, fill 4 heavy jugs with water, travel back to the dock, tie up the boat, carry 200 pounds of water to my car, drive it home, carry it in the house, put it in a large container to heat and add salt, stir for a day, etc, cost me at least $7 in fuel, many hours of my time (which is money, right?), and I still risk adding some unknown killer to my reef, just hardly seems worth the trouble. And my back hurts from carrying all that water around all day.

So why does one want to add NSW to their tank again??