I am quite new to hydroponics so forgive my ignorance :)
I am planning to make a simple DWC set up (for tomatoes) and was wondering if I could use a water soluble fertilizer (20-20-20 with Mg Fe Cu etc.) as the nutrient solution since (according to the label) it can provide NPK with other macro and micro nutrients for plants that grow in soil-less environment or should I only use nutrient solutions made especially for hydroponics? How different are they?
Thank you!