- Alkalinity: 8-11 dKH - Calcium: 380-450 ppm - pH: 8.1-8.4 - Temperature: 74-78°F - Easy to moderate to keep - Description: Trachyphyllia, also known as "Trachy," are large polyp stony corals that display stunning color variations. They require stable water parameters and moderate lighting. Their fleshy appearance and unique patterns make them a captivating addition to reef tanks.