It's about time there was a new all in one guide for discus. It has really helped me as I was a bit confused on some subjects, thanks again Jimmy Roberts, South Yorkshire, UK After reading so much different information about discus it left me not knowing which advice to take but with your information my discus look better than ever. Their color has picked up lots and they seem happier now. Thanks Michael Pierce, CA, USA Great guide Rob, You haven't missed a thing out. It's like a discus bible, every discus owner should have it. I followed some of your advice and now my discus have stopped hiding away. Franz Weidman, Germany All I can say is Wow, I feel like an expert after reading your book I've only been keeping discus f...