It's been set up almost 6 months. No water changes, just top off RO water. I have a plexiglass cover on it so it doesn't evaporate much (3/8" gap between the cover and 12" tank for air). S.G 1.015 no lights no heater. Tiny bit of food twice a month. Only 7 shrimp. No reproduction. I got the tank and dried coral from eBay. Two Little Fishes NanoMag for cleaning algae film (not much). No direct sunlight.