When measuring nutes (PPM, CM, etc) and you're using 2-3 nutes, how do you know what to add in / top off?

I realize some don't touch the nute load at all until after a few gallons of RO have been added in, then flushed, then new nute mix. I imagine these people never measure nute loads.

Others measure the nute load constantly, just like measuring pH.

Not sure which is the best way to go.
Projman Reviewed by Projman on . measuring nute levels with multiple nutes going When measuring nutes (PPM, CM, etc) and you're using 2-3 nutes, how do you know what to add in / top off? I realize some don't touch the nute load at all until after a few gallons of RO have been added in, then flushed, then new nute mix. I imagine these people never measure nute loads. Others measure the nute load constantly, just like measuring pH. Not sure which is the best way to go. Rating: 5