I just bought timers so all I need to know is how you want to configure it.
How many different timer circuits do you want?
Lazy runs all dosing pumps on one outlet for the exact same time, so he only needs on timer. I run on on each doser, as my times are different. Alk is the most dangerous, but I have fat fingered my calcium, and dosed an entire gallon at once.
Shoot me a pm