Hydroponics: Questions and Answers for Successful Growing Howard M Resh Ph.D. 

287 Questions and Answers on topics like nutrition, essential elements, water, diseases, environmental conditions, nutritional disorders, sterilization, herbs and other food crops. 

Find helpful pointers on growing many specific products.

This paperback book is well indexed and illustrated to easily find the answers you need.

An excellent resource with clear and direct answers to problems and questions that arise in everyday hydroponic gardening.