Thinking of upgrading my single speed pump to a variable speed Pentair. Current ichlor salt system has an external timer which turns the pump and chlorine generator on at the same time. How will this work with the variable speed pump that has its own timer? If i want to run the pump say 6 hrs per day, will i need to set the external timer to the same time as the pump timer? or can i leave the salt generator permanently turned on, and it will only generate chlorine when it sense water flow? there seems to be no way to control the generator from the pump timer.