Wysiwyg 4.5” - Alkalinity: 7-9 dKH - Calcium: 380-420 ppm - pH: 8.0-8.3 - Temperature: 75-80°F - Easy to Moderate to keep - Description: Symphyllia corals, also known as brain corals, are beautiful LPS corals with distinctive and colorful ridges that resemble brain folds. They are generally hardy and can tolerate fluctuations in water conditions, making them a great choice for reef keepers of all levels of experience.