From Calcium Reactor (use Arm Media) i got 0.11 ppm
From Main Tank 300 Gal. i got 0.08 ppm
From Refuge (90 Gal.) i got 0.04 ppm
I remove the Media , clean W/RODI ( 20 gal.)
I have a wrong place for IN take for C.R, was first stage, i guess i got lots of Detritus.
After 3 days i clean the C.R i test again Tank 0.03 ppm.