This is 15 years of Vet experience with all aspects of Koi health. Treatments and tips for a healthy environment, proper husbandry, symptoms of disease and remedies for parasites and sores, Dr. Johnson covers it all. In plain terms for the hobbyist, he provides the details you NEED to save fish. Symptoms, simple tests, logic and simplicity to educate you on preventing and treating fish diseases. This book is as timely / timeless as the appearance of fish disease, and the need for education in the testing and treatment of these conditions in fish. Learn about prevention and treatment BEFORE you're in trouble. "Anyone that has bought one koi, should have this book before they buy number two!" - David H. "Thanks for writing such an informative, easy to read book. I appreciate your easy going sense of humor and style of writing!" - Patti B. "Excellent for beginners, without sacrificing plenty of depth where needed. A Koi keeper's bible!" - S.G. Ontario "Not a wasted word. Well done!" - Mike S.