Was wondering if anyone has successfully configured a Neptune Systems DOS to dose phytoplankton into the aquarium and then have the lines run in reverse to clear most if not all of the phytoplankton from the dosing lines back into the container. I know this is possible on a GHL Doser but would be awesome if the DOS was also capable. I plan to dose Reef Energy AB+ using one doser and OceanMagik in the other doser. The lines will run back into a container storage in a refrigerator.