I dump 10 gals. in a rubbermaid and add salt. MIx with a powerhead just long enough to mix the salt and to bring it up to temp, sometimes I heat water on the stove. When the water is the temp I want and my salinity is right I add the water. The whole process from freshwater to being ready to dump in my tank is about 25-30 mins. On that note, I have had no problems with anything, all my levels check out great.