I'm not sure which one to get! I've never used one before so i don't know really how many modules I will need. Maybe someone can help. My upcoming tank specs; 30 gal IM Nuvo Kessil 360w Colbalt heater IM Ghost skimmer Sicce return (maybe) Mp10 Qd I want to dim the kessil on/off, auto top off with the apex, and control the temp on the heater. I will also want to control the mp10 if/when i get that in the future. It doesn't seem like i have too many demands but I want to be sure I get what i need. Thanks for any tips!