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here my setup
You are correct!
Close. Let's say you do not have a ProfiLux controller, and are starting off with a brand new doser.
You can purchase a Doser (model) 2 or 2.1 in either 2, 3 or 4 head(pump) configurations.
Say you purchase the Doser 2.1, STANDALONE, 2 pump. You can then, down the road when you have a need for more, purchase the 2 to 4 pump upgrade kit. This will get you to 4 pumps on the first doser(chassis). Should you then find yourself needing a total of 7 pumps, you would simply purchase another Doser 2 or 2.1 chassis, but a SLAVE model, with 3 pumps. The Slave models come at a reduced cost.
Look at us late night hospital workers. Posting all night. Holla!Sorry for the late reply, I had to go do my rounds. I work nights in a hospital.
Anyway...
Ok I see now. That makes sense. Well...I own an apex and I think i'll get the Doser 2.1 standalone (4 pump). Then later i'll buy another chassis (slave model) with 4 additional pumps after I get used to playing with the first one. I wanna dose ALK, CAL, & MAG of course and a lot of trace elements.
Thanks for all your help!