Medakas grow to roughly 4cm. They can live for up to 5 years if kept well. They tolerate a wide temperature range, and will move from as little as 0 Degrees to as high as 27 Degrees . For best results: Temperature: 18C 24C. pH: 7.0 8.0 General Hardness: 50 300 ppm. Medakas mix well in a community tank, with smaller species of fish like white clouds and danios, but they will also get along with goldfish and paradise fish and are ideal for stocking in unheated aquariums and Ponds. There are a few different types of medakas, including the moonlight, gold and orange types and the standard golden variety. They are all the same shape and have the same fin formation generally. The Golden type is a long slender fish shape with an arched back and nice colorations of orange and yellows. They are a very popular aquarium and pond fish and a perfect addition to your tank or pond, a very hardy species, very forgiving for water quality making it an excellent beginners fish.