Tank Setup: Provide a tank of at least 20 gallons for a pair of Half Black Angelfish. Use a dark substrate, as it enhances their colors and provides a natural setting. Water Parameters: Maintain a temperature between 74-78°F (23-26°C). Keep the pH level around 6.5 to 7.5. Ensure water hardness between 3-8 dGH. Filtration: Use a gentle to moderate filtration system to maintain water quality without creating strong currents. Tank Decor: Include tall plants, driftwood, and rocks for hiding spots and territorial boundaries. Half Black Angelfish appreciate vertical structures in the tank. Diet: Offer a varied diet of high-quality flake foods, pellets, and frozen or live foods like brine shrimp and bloodworms. Feed small portions multiple times a day. Social Behavior: Half Black Angelfish are generally peaceful but can become territorial during breeding. Keep them in pairs or groups if the tank is spacious enough. Compatibility: Choose tank mates that are peaceful and not overly aggressive. Avoid keeping them with fin-nipping species.