Difficulty: Moderate Max Growth Size: 40cm Temperament: Preferred Water Parameters: Temperature:24°C – 26°C. pH Level: 6.0-8.0 General Hardness: 100—200 ppm. Range Oscars originate in the Amazon River, Sth America Selective breeding has seen a range of colour being developed. The different colours include tiger, red & albino forms. More recently long tailed or veil-tailed Oscars have also been developed. Oscars are a beautiful, intelligent Cichlid that are easy to maintain. The most popular sizes are the juvenile 4 or 5cm long fish. The colours on these smaller fish may not be as bright as adult sized fish but they grow rapidly and can reach 25 cm plus in a few short months. For this reason, the Oscar should be kept in a large tank and should not be kept with very small fish. An efficient filtration system is also needed, as they are messy eaters!