Ive heard of people who have saltwater res and stuff to drain their tank, but havent seen one that is fully automatic I.E. mixes and heats the saltwater and does the drain and change
I'm sorry, but "WC" is often used to indicate "Water Closet." The ADA requirements have prescribed automatic WC valves Your title made me chuckle. ( I'm too lazy to set up the auto change myself, but lots of people on here do.)