Keeping Black Moors involves providing a spacious tank (20+ gallons), excellent filtration, smooth decorations to protect their eyes, and a varied diet of sinking foods, while maintaining cool, clean water (65-75°F), as their poor eyesight and slow movement make them vulnerable to competition and injury. Pair them with other fancy goldfish, feed them sinking pellets and blanched veggies (like peas) to prevent swim bladder issues, and perform regular water changes.