What we do, and I know others here do as well, add Calmag to 200 PPM then nute to the PPM your looking for.
tinytoon Reviewed by tinytoon on . Does Low PPM Water Need Calmag+ ? I just got my TDS PPM Meter. I tested my tap water and it has around 35 PPM. Does this mean I need calmag+ ? Rating: 5