If you’ve ever seen a reef tank with long, flowing tentacles waving like flames in the current, chances are you were looking at a Torch Coral. They’re one of the most eye-catching large polyp stony (LPS) corals in the hobby, known for their dramatic movement and stunning colours. But while they’re hardy compared to some species, keeping a Torch Coral healthy and thriving does require the right approach.
In this guide, we’ll cover everything you need to know about caring for Torch Corals – from placement and flow to feeding and water chemistry – so you can enjoy those famous fiery tentacles in your own reef aquarium.
Why Are Torch Corals So Popular?
Torch Corals (Fimbriaphyllia glabrescens, formerly Euphyllia) are loved for their long, sweeping tentacles tipped with bright neon or gold. In a well-lit tank, they glow beautifully under blue LEDs, becoming a centrepiece coral in many reef aquariums.
Unlike their cousins, the Hammer and Frogspawn corals, Torches have longer, thinner tentacles, which makes them even more striking. However, that length also means they’re a little more aggressive and need more space to avoid stinging other corals.
Lighting Requirements
Torch Corals thrive under moderate to high lighting. A PAR of 100–180 is usually ideal, though some high-end Aussie Gold morphs do well with a little extra light. They’ll adapt to different lighting setups – LED, T5, or hybrid – but consistency is key. Always acclimate them to stronger lighting slowly to avoid bleaching.
If you’re unsure, start Torches on the lower side of your reef and gradually move them upwards until you find their sweet spot.
Water Flow
Getting the right flow is crucial for Torch Corals. Their tentacles need movement, but too much direct flow can damage them. Aim for moderate, indirect flow that causes their tentacles to sway back and forth like flames. Avoid blasting them with strong current from a wavemaker – this can cause the tissue to tear or recede. A random or pulsing flow mode is ideal.
Think of it this way: you want your Torch to look like it’s dancing, not struggling.
Placement in the Aquarium
Torch Corals are stunning centrepiece corals, but they need space to spread out. Place them midway in the tank, depending on your lighting and flow setup. Give them plenty of room – their sweeper tentacles can extend several inches, easily stinging nearby corals. They don’t always mix well with other Euphyllia (Hammer, Frogspawn), so it’s safer to keep them separate.
If you’re aiming for a Torch “garden” (a popular trend among reefers), group different colour morphs together – but make sure you monitor for compatibility, as some morphs can be aggressive towards each other.
Feeding Torch Corals
While Torch Corals rely heavily on light for nutrition through their zooxanthellae (algae living in their tissue), they’ll benefit from occasional feeding. Offer mysis shrimp, brine shrimp, or coral foods once or twice a week. Target feeding helps, but don’t overdo it – too much food can pollute the tank. A healthy Torch will often extend feeding tentacles when food is present, making it easy to see when they’re hungry.
Feeding isn’t strictly necessary, but it can boost growth and enhance colour vibrancy.
Water Parameters
Like other LPS corals, Torches prefer stable, reef-safe water conditions. Temperature should be kept between 24–26°C, with salinity at 1.025 SG. Alkalinity should remain between 8–10 dKH, calcium at 420–450 ppm, and magnesium between 1250–1350 ppm. Nitrates between 5–15 ppm and phosphates around 0.03–0.1 ppm are ideal – they actually benefit from a little “dirty water.”
Stability is far more important than chasing perfect numbers. Fluctuations in alkalinity or salinity are often what cause Torches to retract or start losing tissue.
Common Problems with Torch Corals
Even healthy-looking Torch Corals can run into problems. Tissue recession is often due to stress from unstable water chemistry or too much flow. Brown Jelly Disease is a fast-moving bacterial infection that can wipe out colonies. If spotted, frag the healthy heads away from the infected ones and dip them immediately. Bleaching is caused by too much light or sudden changes in tank conditions.
Keeping a close eye on your Torch’s tentacle extension is the best early warning system. If it’s sulking or retracting, something is off.
Why Torch Corals Are Worth the Effort
Yes, they need a little more space and care than some LPS corals, but Torch Corals are absolutely worth it. They add unrivalled movement and colour to a tank, especially when placed in a focal point under blue light.
Many reef keepers dream of building a Torch Coral garden – a glowing collection of different varieties swaying together like a living fire display. And when you get the conditions right, they can grow into impressive colonies that become the pride of your aquarium.
Final Thoughts
Torch Corals are one of the most breathtaking corals you can add to a reef tank. With moderate lighting, gentle flow, stable water conditions, and a little feeding, they’ll reward you with long, flowing tentacles that bring your aquarium to life.
If you’re ready to step up from beginner-friendly corals, a Torch Coral is a fantastic choice – just give it the space it needs to shine.
