The Hayward Omnilogic controller only supports one T-cell directly. The largest T-15 can chlorinate up to 40K gallons and I have a larger pool so I have a separate AquaRite controller installed for the second T-Cell. The AquaRite is currently wired so that it comes on when the main pool pump is on. However, I notice that the Aquarite can be remotely controlled (there's an LED and screw terminal for it) over a 4-wire communication link. I also see multiple available screw terminals on the Omnilogic with the same Green, Yellow, Black, Red wire interfaces. Does anyone know if the Aqualink can be remotely controlled by the Omnilogic? Does anyone have details of the 4-wire communication link (is it RS-232 or 485 or something proprietary)?