I know what you mean -- Everyone is an expert grower. In their own mind. The only person that hasn't wanted to tell me what to do is a man I'm going to supply meds who has a PHD in horticulture, owns a landscaping business, and is at present writing a book on advanced outdoor drip systems. He looked at my plants and told me they were beautiful and there was nothing he could tell me to improve what I am doing -- he did teach me how to use the hydrometer. Made me feel great.