Getting Started with Acropora Coral Care
When it comes to reef keeping, few corals get as much attention as Acropora. These branching SPS (Small Polyp Stony) corals are famous for their incredible colours, fast growth, and striking structures that turn a reef tank into something truly special. But let’s be honest – Acropora also have a bit of a reputation. They’re not the easiest corals to keep, and they’ll quickly let you know if something isn’t quite right in your tank.
Why Choose Acropora?
Acropora are often seen as the crown jewel of reef tanks. Their bright blues, greens, pinks, and purples pop under reef lighting, and their branching growth gives your tank that authentic “mini reef” look. For experienced reefers, growing Acropora successfully is a bit of a badge of honour.
Placement in Your Tank
Acropora corals love strong light and high flow, so the best spot is usually higher up in your tank. This keeps them closer to your lights and gives them the currents they need. Make sure they’ve got plenty of space to grow – these corals branch out quickly and can shade anything below them.
Lighting Needs
Acropora are demanding when it comes to lighting. They need intense reef lighting in the right spectrum to fuel their growth and maintain their colours. Modern LED systems with controllable spectrum are ideal because they let you fine-tune intensity without overwhelming your corals.
Water Flow
Strong, randomised flow is key for Acropora. Powerheads or wavemakers that can create turbulent, changing currents are best. Constant one-directional flow won’t cut it – these corals like to be “rinsed” from different angles to remove waste and bring in nutrients.
Feeding Acropora
Like most SPS, Acropora get the bulk of their energy from light, but they do benefit from target feeding. Fine powdered foods and amino acid supplements can help improve colour and growth. They don’t need heavy feeding, but a boost now and then can make a noticeable difference.
Water Parameters
Stability is everything with Acropora. These corals don’t like swings in water chemistry. Here are the ranges to aim for:
Temperature: 24–26°C
Salinity: 1.025–1.026 SG
Alkalinity: 8–9 dKH (keep stable)
Calcium: 420–450 ppm
Magnesium: 1300–1350 ppm
Nitrate: 2–10 ppm (don’t run too “clean”)
Phosphate: 0.02–0.05 ppm
The key is consistency. Even small fluctuations can cause Acropora to lose colour or, in the worst case, suffer tissue loss.
Common Challenges
Colour loss (browning): Usually caused by low light or excess nutrients.
Tissue recession (STN/RTN): Can happen quickly if parameters swing. Stability is the best prevention.
Pests: Keep an eye out for Acropora-eating flatworms (AEFW). Dipping and quarantining new frags is a must.
Why They’re Worth It
Yes, Acropora are demanding, but they’re also some of the most rewarding corals you can keep. Once they settle in and start growing, you’ll see fast results and some of the most vibrant colours in the hobby. They can completely transform the look of your reef.
Final Thoughts
If you’re looking for a coral that will push your reefing skills and give you a truly stunning display, Acropora are hard to beat. Just remember the golden rules: strong light, strong flow, and rock-solid stability. Nail those three, and you’ll have one of the most beautiful reef tanks out there.
