Torch corals (Euphyllia glabrescens) are a favorite among reef keepers for their long, flowing tentacles and vibrant coloration. Known for their dynamic movement and range of hues—greens, golds, purples, and more—they add an elegant, natural feel to any aquarium. Torch corals are a type of Large Polyp Stony (LPS) coral and are relatively easy to care for, making them an excellent choice for both beginners and experienced aquarists.

Their peaceful nature, combined with their ability to adapt to a variety of tank conditions, makes Torch corals a staple in reef tanks worldwide.

Location

Torch corals (Euphyllia glabrescens) are found throughout the Indo-Pacific region, including areas such as Indonesia, Fiji, and the Great Barrier Reef. They typically inhabit lagoonal and reef slope environments, where water flow is moderate, and light is diffused. These habitats provide the perfect balance of nutrients and conditions for Torch corals to thrive.

Water Chemistry

Torch corals thrive in stable water conditions with parameters that support their growth and health. Maintaining consistency is key to avoiding stress and promoting vibrant coloration:

• Calcium: 400-450 ppm
• Alkalinity: 8-9.5 dKH
• Magnesium: 1300-1500 ppm
• Nitrates: 5-15 ppm
• Phosphates: <0.10 ppm
• Temperature: 75-80°F

Torch corals are more tolerant of slight fluctuations in water chemistry compared to some SPS corals, but stable parameters are still crucial for their long-term success. Keeping salinity at 1.024-1.026 and pH between 8.1-8.4 will provide an ideal environment for these LPS corals to thrive. Regular testing and dosing will help ensure they remain healthy and vibrant.

Lighting

Torch corals prefer moderate to high lighting, thriving under a PAR range of 100-200. These corals are adaptable and can grow well under various lighting setups, including LEDs, T5 fluorescent lights, and metal halides. Providing balanced lighting will encourage healthy growth and maintain their vibrant coloration.

At Top Shelf Aquatics, we use a combination of Ecotech Marine Radions and metal halides to achieve optimal lighting for Torch corals in our aquaculture facility. Gradually acclimating Torch corals to their new lighting environment is essential to prevent stress or bleaching. Starting with lower intensity and slowly increasing it over 2-3 weeks will ensure a smooth transition.

Water Flow

Torch corals prefer moderate, indirect water flow that allows their long tentacles to sway gently without being blasted by strong currents. Proper water movement is crucial for bringing nutrients to the coral and removing waste, helping to maintain its health and vibrant appearance.

At Top Shelf Aquatics, we use a combination of Ecotech Marine MP’s, Reef Octopus Octo Pulse, and Sicce XStream wave makers to create the ideal flow environment for Torch corals in our aquaculture systems. Avoid placing Torch corals in areas with too much direct flow, as this can damage their delicate polyps and cause retraction. Instead, aim for flow that mimics natural reef lagoons, keeping the coral in constant yet gentle motion.