You can't just find information like this from any other source!! The information included in the K.O.I. Guide is gleaned from dozens of Koi books, including textbooks like Fish Disease, by Edward J. Noga. It includes forumulas and recommendations, and each page is reviewed by top experts from all over the world! This is not 'old wives tales' or a pamphlet that's 20 years out of date - it's an actively edited, current, accurate and useful compilation. 100's of hours or work have gone into the creation of these pages, and it's all printed on waterproof paper in a waterproof binder. You can actually submerge the whole thing, and then wipe it off and start putting in your own notes! You get the Guide and the first 30 pages with your paid membership, and the plan is to produce additional 30-page supplements for the next few years until the binders are full - each will be FREE along with your renewed membership. This book is an amazing resource. Please take yours to club meetings, shows and anywhere Koi folk get together, and let other Koi keepers see it - we know they will want one of their own! The more that Koi keepers know, the better this hobby becomes! Share your Guide and your knowledge!