During veg, EC goes up due to plants sucking up more water than nutes, and evaporation.
As EC goes up I dilute the rez with pure structured water
Interesting that you are switching to hydro. My new germ/clone technique uses coco to start them.
I then place into 3" coco insert and filled with cc, but over time some of the cc was draining back into my rez. Probably not a big deal, but this time...
Once decent root mass develop I will wash the cc off and insert into 3" net pots side filled with small ornamental stones (Dollar Store)
See pics from last clones
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yeah i mentioned it somewhere in here , my nute schedule is going to change quite a bit once i switch over to complete hydro , & i'm going to have to start all over again on dialing in these nutes to that system . but having a good handle on it from using it in coco these last few years ..... i shouldn't have many problems . just gotta get used to recirculating rez's & how they react .