Gorgonian Aquarium – The Ultimate Guide To Keeping Stunning Sea Fans

If you have ever stared at a vibrant coral reef, you have likely been mesmerized by the graceful swaying of sea fans. These elegant structures, known as gorgonians, bring a unique sense of motion and verticality that most stony corals simply cannot match.

Maintaining a gorgonian aquarium might seem intimidating at first, especially with their reputation for being “difficult.” However, I am here to tell you that with the right knowledge, these octocorals can thrive in your home reef.

In this guide, we will break down everything you need to know, from choosing photosynthetic species to mastering the art of flow. Whether you are a beginner or looking to level up your reefing game, this setup is perfect for you!

Understanding the Two Main Types of Gorgonians

Before you purchase your first specimen, you must understand the critical distinction between the two main categories of gorgonians. This single piece of information will determine whether your new coral thrives or slowly withers away.

Photosynthetic Gorgonians (The Beginner’s Choice)

For most hobbyists, I highly recommend starting with photosynthetic species. These corals harbor symbiotic algae called zooxanthellae within their tissues, much like your favorite zoanthids or leather corals.

These species derive a significant portion of their energy from aquarium lighting. This makes them much more forgiving for intermediate keepers who may not have the time for intensive feeding schedules.

Common examples include the Purple Candelabra and the Rusty Gorgonian. These are hardy, fast-growing, and provide that classic “sea fan” aesthetic without the extreme maintenance requirements.

Non-Photosynthetic (NPS) Gorgonians

Non-photosynthetic species, often called NPS gorgonians, are breathtakingly beautiful but represent a significant jump in difficulty. They do not use light for energy and instead rely entirely on capturing plankton from the water column.

Keeping NPS varieties requires heavy daily feeding and specialized filtration to handle the resulting nutrient load. While they are stunning, they are generally best left to advanced aquarists who enjoy a “high-input” system.

Don’t worry—if you are a beginner, sticking to the photosynthetic types will still give you that incredible gorgonian aquarium look with a fraction of the stress!

Essential Equipment for a Gorgonian Aquarium

To succeed with these corals, your hardware needs to support two things: consistent water movement and pristine water quality. Let’s look at the gear you’ll need to get started.

High-Quality Powerheads for Laminar Flow

Gorgonians live and die by the flow. In the wild, they are found in areas with strong, consistent currents. This flow is essential for bringing them food and, more importantly, helping them shed their waxy outer skin.

I recommend using controllable wavemakers that allow you to create a “gyre” or a strong laminar flow. Avoid pointing a powerhead directly at the coral’s tissue, as this can cause localized damage.

Instead, aim for a broad, sweeping current that makes the entire fan sway gently back and forth. If the polyps are retracted for more than a few days, it is often a sign that the flow is either too weak or too turbulent.

Lighting for Photosynthetic Success

If you have opted for photosynthetic species, you will need moderate to high lighting. Most of these corals thrive in the PAR range of 150 to 250.

LED fixtures that offer a full spectrum are ideal. While they aren’t as light-hungry as some Acropora, they still need enough energy to support their zooxanthellae. Ensure your light schedule is consistent to prevent stressing the colony.

Efficient Protein Skimming

Because gorgonians (even photosynthetic ones) benefit from supplemental feedings, your nutrient levels can rise quickly. A high-quality protein skimmer is your best friend here.

The skimmer will remove excess organics before they break down into nitrates and phosphates. This is crucial because nuisance algae can quickly grow on the branches of a gorgonian, eventually smothering the polyps.

Water Parameters and Chemistry

While gorgonians are technically “soft corals,” many species have a calcitic skeleton or a woody core made of gorgonin. This means they still require stable water chemistry to grow their intricate structures.

The Big Three: Calcium, Alkalinity, and Magnesium

You should aim to keep your Calcium between 400-450 ppm and your Alkalinity between 8-10 dKH. Stability is far more important than hitting a specific number, so try to avoid large swings.

Magnesium should be maintained around 1350 ppm. Magnesium is the “glue” that keeps your calcium and alkalinity in balance, preventing them from precipitating out of the water.

Nutrient Management (Nitrates and Phosphates)

Gorgonians are quite tolerant of slightly higher nutrients compared to sensitive SPS corals. In fact, a “bottomed out” tank with zero nitrates can actually starve them.

I suggest keeping Nitrates between 5-10 ppm and Phosphates around 0.03-0.05 ppm. This provides enough “fuel” in the water for the corals to remain vibrant without fueling a massive hair algae breakout.

The Art of Placement and Flow

Where you place your coral in the gorgonian aquarium will determine its long-term health. Unlike a mushroom coral that you can just “plop” on the sand, gorgonians require a bit more strategy.

Securing the Base

Most gorgonians come on a small plug or as a fresh cutting. I always recommend epoxying or gluing the base firmly to a piece of live rock. If the coral is wobbling in the current, it will not extend its polyps.

If you are working with a tall sea whip, you might need to use a combination of super glue gel and reef epoxy to ensure it stays upright. Think of it like “planting” a tree in a windy field!

Spacing and Aggression

Gorgonians are generally peaceful corals. They do not have long stinging sweeper tentacles like Galaxea or Torch corals. However, they can be stung by other corals.

Give them plenty of “sway room.” You don’t want their branches constantly hitting a nearby leather coral or being shadowed by a large toadstool. Vertical space is your friend here—use the height of the tank!

Managing the “Waxy” Shedding Process

Don’t panic if your gorgonian suddenly looks shiny or plastic-like and retracts its polyps. This is a natural process where the coral produces a thin waxy film to shed detritus and algae.

This is where strong flow is vital. The current should eventually peel this film away, revealing fresh, healthy polyps underneath. If the film stays on for more than a week, you may need to gently blow it off with a turkey baster.

Feeding Your Sea Fans for Maximum Growth

Even photosynthetic gorgonians are active suspension feeders. While they get energy from light, they will grow significantly faster and show better “fluffiness” if fed regularly.

What to Feed

Gorgonian polyps are generally small, so they require fine particulate foods. Great options include:

• Phytoplankton (Live or concentrated)
• Reef Snow products
• Rotifers and Cyclops
• Powdered coral foods (ensure they are 5-50 microns in size)

Feeding Techniques

I love target feeding with a syringe or a specialized coral feeder. Turn off your main return pump but leave your wavemakers on “low” or “pulse” mode.

Gently cloud the area around the branches with the food. You will see the polyps clench as they capture the particles. Doing this 2-3 times a week will result in explosive growth and vibrant colors.

Top 5 Gorgonian Species for Beginners

If you are ready to start your gorgonian aquarium journey, here are my top picks for success. These are all photosynthetic and relatively hardy.

1. Grube’s Gorgonian (Pinnigorgia sp.)

This is arguably the hardest gorgonian to kill. It grows incredibly fast, is easy to frag, and has a beautiful tan/silver appearance. It is the perfect “test” coral for a new setup.

2. Purple Candelabra (Plexaura flexuosa)

As the name suggests, this species grows in a thick, branch-like structure resembling a candelabra. Its deep purple tissue provides a stunning contrast to the green and brown of many reef tanks.

3. Rusty Gorgonian (Muriceopsis flavida)

This species has a fuzzy, golden-brown appearance when the polyps are extended. It is very tolerant of lighting variations and is excellent for adding texture to the middle of your rockwork.

4. Purple Sea Feather (Pseudopterogorgia sp.)

These are the epitome of elegance. They have thin, feathery branches that move beautifully in the current. They are very fast growers and can reach the surface of the tank quickly.

5. Corky Sea Finger (Briareum asbestinum)

While technically a gorgonian, this one grows more like an encrusting mat with thick “fingers” sticking up. It is incredibly hardy and has large, visible polyps that are a joy to watch during feeding time.

Common Challenges and Solutions

Even the most experienced aquarists run into hiccups. Here is how to handle the most common issues in a gorgonian aquarium.

Algae Overgrowth

If you see hair algae or cyanobacteria growing on the branches of your gorgonian, you must act quickly. Because gorgonians don’t have the same chemical defenses as some stony corals, algae can quickly suffocate the tissue.

Solution: Increase your flow and check your phosphate levels. You can gently brush away the algae using a soft-bristled toothbrush, but be very careful not to tear the delicate coral skin.

Tissue Necrosis (Recession)

If you notice the skeleton showing through (usually starting at the tips or the base), this is often a sign of “RTN” or “STN” caused by stress or bacterial infection.

Solution: Check your parameters immediately. If the recession continues, the best course of action is to frag the healthy portion. Cut the healthy branch well above the receding line and re-mount it. This often “resets” the coral and saves the colony.

The “Banded” Look (Predators)

Sometimes, you might notice small missing patches of tissue in a ring around a branch. This is often the work of a hidden predator, such as a Flamingo Tongue Snail or certain types of nudibranchs.

Solution: Inspect the coral at night with a flashlight. Most pests are nocturnal. If you find a predator, remove it manually. Most common reef-safe wrasses (like the Six-Line or Yellow Coris Wrasse) will also help keep these pests in check.

Frequently Asked Questions (FAQ)

Can I keep gorgonians with Seahorses?

Yes! In fact, photosynthetic gorgonians are ideal hitching posts for seahorses. They provide a natural environment and do not have stinging cells that would harm the seahorses’ delicate skin.

How do I “frag” or propagate a gorgonian?

It is surprisingly easy! Simply use a pair of stainless steel bone cutters or sharp scissors to snip a branch. Peel away about half an inch of the soft tissue at the base to reveal the inner woody core, then glue that core into a hole in a frag plug.

Do I need to add iodine to my tank?

While gorgonians do use iodine, regular water changes usually provide enough. I don’t recommend dosing iodine unless you are using a reliable test kit, as overdose can be toxic to your entire reef.

Why are my gorgonian’s polyps closed during the day?

This is usually due to excessive light or a predator nipping at them. Try moving the coral to a slightly shaded area or check for “nippy” fish like certain dwarf angels or blennies.

Conclusion: Success with Your Gorgonian Aquarium

Creating a thriving gorgonian aquarium is one of the most rewarding projects a reef keeper can undertake. These corals offer a level of dynamic movement and architectural beauty that transforms a standard tank into a living piece of art.

Remember the golden rules: Choose photosynthetic species for a stress-free experience, provide strong, laminar flow, and don’t be afraid to supplemental feed for those extra-fluffy polyps. With a little patience and the steps outlined above, your sea fans will be the stars of your aquarium for years to come.

Don’t wait—start planning your vertical reef today! If you have any questions or want to share your own gorgonian success stories, feel free to reach out to us here at Aquifarm. Happy reefing!