Best way to get new sump/skimmer going?

[mseepman]

I wouldn't every dump skimmate into nice water...it's counter productive.

I recently started up a new sump/skimmer and I filled the sump with NSW (that I made 24 hours before and had mixing for a while). I had made sure that the salinity was matched where I wanted it and that the temp was good too. Then I turned on the skimmer and the pumps and basically gave the tank a new infusion of clean SW. My tank is a 70g with a 20g sump. I didn't do a water change at the same time as I was worried that would change too much in the tank. I did do a change about 2 days later though only a small 5% one.