Did someone say NSW?!
Did someone say NSW?!
I've been using NSW for years now. My home tank used Shinnecock water, and while at the NY Aquarium we used NSW.
At AMW, we use pool sand filters to mechanically filter the new water, and the only adjustments I use for the reef tank is temperature. On some of the smaller tanks, the guys will adjust salinity as needed. We do also have a protein skimmer on the holding tank, and when its working, we'll use it and sometimes inject some ozone, but otherwise its fine to just use it as is.
You can either mechanically filter it with a cannister filter, or simply let it settle out and siphon off the clear water. Some folks will bleach the water then neutralize it as well.
Overall, the water is lower pH, alk, and Ca, but normal maintenance and additives such as kalk easily correct that.
Using NSW is much cheaper and gives you a great excuse to get out to the beach. A bilge pump with some longer leads to your car battery (or an extra battery or one of those emergency jumper battery units) will save your back, otherwise a bucket on a rope will do the trick. I'm a bit biased but I would never use ASW, especially since we live on AN ISLAND!
Any place with good water flow will be a good source of NSW.
Throw a fishing pole in the car as well and enjoy the day.
Joe