We bought a house about 5 years ago that had a 110 ga saltwater fish only aquarium(plus hermit crabs). They left the fish and all equipment. None of it worked, including the lights. The previous owner did not believe in water changes and the water was so yellow/brown you could hardly see through it.\n \nI don't know how the fish survived, but they did and I still have them. I know next to nothing, but I am trying.\n \nI have 2 VHO fixtures with built in fans and moon lights. I have added live rock and some mushroom coral.\nIt has argonite for the substrate. It had an undergravel system but not anymore. I really don't know what I have now :(\nI have a distiller for water changes.\nI will be looking for help soon.