How would I install an ATO on an ALL-IN-ONE (AIO) system?
Due to evaporation, the water level in the pump chamber of your AIO set up will fluctuate. If you have an auto top off, this is where you will want to place the ATO water level sensor for best performance. The ATO return line can be placed in the same chamber or adjacent to it. Water will need to be stored in a separate reservoir underneath inside the cabinet or beside the aquarium. Just be sure the ATO pump you purchase can push the water up the distance needed (each brand pump will vary).