I recently converted my 12g JBJ Nano Cube DX from freshwater to saltwater. I updated the pumps and added a few things; Maxi-Jet 900 pump, Hydor-Flo water deflector, Koralina Nano 240, Rena 50w heater. I picked up some live sand and rock from my LFS and started things up. After three days my tank is looking pretty good; 8.1 ph, 1.024 salinity, 0.0 ppm ammonia, 0.0 ppm nitrites, 0.0 ppm nitrates and a 79° temp. I am thinking of adding a few inhabitants this week and look forward to collecting a few corals as time rolls on, so far its been fun.