Sorry if this sounds stupid but the nutrients always are a problem for me to figure out.
Im gona be growing with General Hydroponic nutrient solution all the way through my hydroponic grow but would i be needing Cal-mag+. Im in the process of buyin all my nutrients for this grow so was wondering if someone could help me n let me know if im gona need it
you will need cal-mag+ if you're using reverse osmosis water or any other type of really pure water. even some tap waters need it. get a TDS meter and test the reading of your tap if its 400+ you'll prob be ok depending on the calcium/mag content(you can get the analysis from your cities water dept).
but def yes if you're running R.O. water