Skimmed thru this real quick.
I am a NSW user here on teh west coast. Been doing it for a few years now. There are a bunch more who use it here. Where I am, I get it straight from a spickot at UCSb hwere they filter it down to 20 microns in a huge sand bed filter. It's the same water they use in their research facilities on campus. I've stored it in closed containers for up to a month before with no airaition and now porblems when I used it. heck I don't even raise the temp of the water when I do a water change.
The water is usually around 68 degrees here. When I do a water change, I usually do a 50 % water change. That's over 200G on my 400G tank. I just drain out the old and fill up with the new. I do this on both of my tanks. One major thing I've noticed is that even though I don't do a thing to the NSw, not even match temps, my corals respond a lot better than they did when I used ASW for my water changes.
I honestly beleive that there are just some elements in NSW that cannot be dupliated in ASW yet our corals and fish depend on it. Since switching to NSW, I've seen my corals respond better, my fish look healthier and I've watched fish that were introduced to the tank with Ich, recover in a short period of time without affecting any of my other fish.
I've even had one of my LPS corals spawn in my tank with NSW. This is a coral that I had for about 4 years before I switched to NSW. After switching, he spawned. This was both a good and bad thing. Good in that it means I'm doing something right. Bad in that it consumed all of the oxygen in the system and caused a crash killing all of my fish and heavly stressing my corals. Some of the fish were 6 years old.
I also started my 400 G tank with NSW when I set it up a year ago. In the tank was a large male Naso tang that had been in the tank for over 3 years. When I bought/moved the system to my house, I filled teh tank with NSW. Shortly after moving the male into the tank, he started to grow some long streamers that he did not have in the tank when it was full of ASW. I don't know for sure if it was the NSw but it sems that way.
I have no scientific proof that NSW is better for my corals or fish, all I have is my 7+ years of obsevation on the same tank and corals to see the difference in my corals after switching to NSW.
