Hello...I plan on purchasing a Tunze 3152 Nano Osmolator for a 29 gallon BioCube and had a configuration question. From what I've read, the ATO sensor should be mounted in the 3rd chamber of the cube, should the water return line then be pointed into the actual main tank itself or pointed into the 3rd chamber as well? I'm having a hard time understanding the relationship between the BioCube main display and the 3 chambers in the back. How exactly do they work? Thanks...

