I consider my tank fairly successful, and the only big things I do are water changes and zeovit. I'm sure you've heard everyone complain about daily dosing, it's so tough, takes too much time, blah blah. Mostly, it's true, and I just don't do it
I'll remember to dose properly for a couple of days, then miss 3 weeks. I agitate the rocks three days in a row, then don't for the rest of the month. So, I'm not sure if just having the reactor with the rocks is enough, or maybe it just doesn't matter. To me, the biggest change this tank has over any other (less successful) tank I've had is large frequent water changes.