is it possible to just use ROwater in hydro for the first couple days newly rotd cutn

hey im new to hydro im starting real small I have newly rooting cuttings and i have the whole line of ionic nutrients but its for soil im not sure how much to use or if i was told it would work fine but I'm worried about over doing it and I'm outta cash get go buy anything else right now any help would be much appricatted thank you