Managing tank from a distance
Like the others said, an apex and a WiFi camera are a good start, but the other thing that can make a big difference is redundancy. When I set up my 220 I ran two dedicated circuits for the tank. I have two return pumps (one plugged into each circuit) and two heaters (again, one in each circuit) and two lights on one circuit and one on the other. Over New Years I went to visit my parents for a week and a half and while I was gone the GFCI on one of the circuits tripped. Since I had the apex and the camera I could tell that water was still moving and the tank was still at the right temperature since one of the return pumps and one heater were still going. The tank limped along like this for about 4 and a half days until I was got home and reset the circuit. The fish and corals were still in great shape when I got there.