OK!!!! Been a while. I ruptured my Distal biceps tendon and had it surgical reattached so i had 3 months of time to build this tank. Now that I am back to work it seems that every spare time i have is making this tank perfect (no such thing but being a surgical nurse it is my only outcome acceptable). To follow is the tank, the auto top off, and just finished the auto water change. I mix salt once a week and leave it alone. It will take off 3 gallons a day. This takes in consideration of a tank that is 165 gallons (140 gallons of usable water, and a 40 gallon sump that is most likely 30 gallon usable by the time u consider live rock, pump, socks, and protein pump).