What does it take?
Nothing more really than going with a skimmer. Would I recommend it? I would be less likly to recommend it to a beginner but to someone fimular with how much and how often to feed and how to not overstock a tank yes i would. BTW I run skimmerless.
One of the keys to not running a skimmer is to keep your tank understocked, feed sparingly and perform regular water changes. Or atleast thats my view of it.
Skimmers help remove yoru tank of disolved solids like fish waste and such. If you have a well balanced tank that is not overly stocked and is not fed on a heavy schedule then you can go skimmerless as the amount of disolved solids in the tank will be lower than if you had a heavly stocked and heavily feed tank.