Complex sentence: The fundamental principle of hydroponics relies on fertilized & aerated water which provides both nutrition and oxygen to a plant's root zone, often involving relatively sophisticated mechanization which can be daunting to casual hobbyists.
Split into simpler sentences: The fundamental principle of hydroponics relies on fertilized and aerated water which provides both nutrition and oxygen to a plant's root zone. It often involves relatively sophisticated mechanization processes which can be daunting to casual hobbyists.