I'm going to try growing SanMarzano tomatoes (to make sun dried tomatoes) and peppers on a flat and a sloping roof in the middle of Portugal . Having solar panel, pump, Arduino control etc I wish to try to set it up hydroponically. Does anyone know of shop which has Hydroponic supplies, mainly liquid feed and testing kit? - I used to use Esoteric Hydroponics but this is no longer an option.