For me it’s the whole thing. What I put in and when and how many. What fish and in what order how’s the rock going to hold and look with certain coral. How’s the wires. Is everything the best there is to make it best for the living creatures it can be if not the ocean then it’s up to me to make sure it’s as close as possible.
But most of all... if I get stuck on wanting to do something with the tank.. awc, ato etc I could be up until 4 am researching it. Did that last night trying to figure out how to pump my RODI to the reservoir without hooking up a hose and running it through the living room. And walaaaaa I got it at 4am then slept like a baby.