All, This is the Tetra published book written in German, by Gerhard Brunner and Peter Beck. Great Photography and an interesting section on (and photos of) different types of algea. Lots of great *aquaruim plants in their natural state* sorts of pictures as well. Wanted: Nitella, Ammania spp., Large Anubias spp. W.H.Y.? Brian Perkins West Linn, OR