I follow Latewoods legacy 3 part GH use R/0 water and top off with 5ml CalMag plus per gallon. I change resevoir weekly simple and works great for me
danlboy Reviewed by danlboy on . topping off hydro unit When you grow hydroponically(DWC), you have to keep your reservoir topped off correct? Do you just keep it topped off for the two weeks with fresh water? Or do you have to add nutes to all the water added during the two weeks before water change. Rating: 5