If you’re looking for a fish to grow as quickly as possible, tilapia is the way to go.Tilapia have a large appetite and will eat more than most other fish. They can grow up to eight inches long and weigh up to three pounds. They also have an active metabolism that helps them grow fast.
The most common varieties of tilapia are: White Tilapia – These are the most common variety of tilapia and are generally the smallest. They can reach up to four inches long and weigh between one and two pounds. White tilapia are also the easiest to breed. Pink Tilapia – These are sometimes called rose tilapia or “Ruby” tilapia.They have red pigment in their skin and they are slightly larger than white tilapia. Black Tilapia – These are also known as tiger tilapia and have a dark-colored flesh. They are usually the largest variety of tilapia. They can grow up to six inches long and weigh up to three pounds.  Tilapia are a low maintenance species and require little more than a shallow water bath. They do like to be kept in water with a pH of 2.5 –3.5 and a temperature of 74°F – 77°F. They also enjoy being kept in a slightly acidic environment.