Good point saltyphish! I never realized without an ATO water level fluctuations in chamber 2 would make tuning in a skimmer difficult. Chamber 1 has same water level always .
I have a 29 with mini max reactor and heater in first chamber running gfo or carbon. In tank media box running chemi pure elite and purgen in first half of chamber 2 hydro slim nano skimmer in second half of chamber 2. Chamber 3 has a drop in algae scrubber and return pump.