This section gives extremely detailed breeding information for many of the major families, (tetras, barbs, danios, rainbowfish, cichlids, gouramis, catfish, livebearers, goldfish, koi etc) with individual representative species from each family. Information includes the best water chemistry and temperature for breeding, setting up for spawning, the spawning process, early rearing and grow-out, harvesting and packing, with many important breeding and production characteristics specific to the species. Strongly recommended in conjunction with PART 3, for both hobbyist and commercial breeders.