Mine is an 05 not an 06, and it's attached to the top of the mazzi injector valve, which is to the left of that flow switch thing.
I don't have that prozone or propure upgrade, or whatever they call it.
OK then, mine is an early 05 (April) Cayman and my dealer said Artesian only would put in an UV ozonator. Maybe they upped it to a CD unit as time went on.
Do you ever smell ozone? Did your "filter time" come from the factory for 2 hours every 12? My tub defalts to 6 every 12 after turning the power off but I have the lower level electronics vs the Gold and Platinum series. Very simple controls!
Have you ever tried upping the time? If you do try it, try to see if it has that ozone smell. I think the foam blanket is causing the water to not give off a lot of gas, the circ pump return port gives a line of bubbles about 1 1/2 to 2 feet long and the blanket is over that area.
As far as cost, I think probably $5.00 a month for 24 hour ozone and less for using ozone less but a CD unit uses 30 watts so 30 watts x 24 hours x 30 days = 21.6 KWH @ $0.14 = $3.024 to operate. I could live with this IF I didn't need to dose my tub on an every other day basis.
I'll see what happens with the 24hour ozone test.