Pipe Organ Coral Frag (Row #71)

What Is Pipe Organ Coral?

Pipe Organ Coral is one of the most fascinating and visually unique soft corals in the reef aquarium hobby. My name is March, I am the owner here at Fragbox and I have been keeping and selling Pipe Organ Corals for over 16 years. Despite being classified as a soft coral, Pipe Organ is unique in that it actually builds a hard calcium carbonate skeleton — a rigid, bright red or orange structure made up of densely packed tubes that look exactly like the pipes of a pipe organ. When the polyps are retracted you see the stunning red skeleton in full. When the polyps are extended the coral transforms into a lush, feathery mass of green, white, or purple. The contrast between the hard red skeleton and the soft extended polyps is unlike anything else in the hobby.

Appearance

Pipe Organ Coral is genuinely one of the most striking corals in a reef tank when you understand what you are looking at. The skeleton is a deep brick red or orange colour and is made up of tightly packed vertical tubes. Each tube houses a single polyp. When the polyps are retracted the skeleton is completely exposed — it is so vivid and structured that many people mistake it for a decoration rather than a living coral. When conditions are right and the polyps extend, each tube produces a single feathery polyp with eight pinnate tentacles. A fully open colony looks like a carpet of miniature feathers hovering above the red skeleton. The effect under blue LED lighting is extraordinary.

Ease of Care

Pipe Organ Coral has a reputation in the hobby for being challenging but in our experience at Fragbox it is more demanding than a soft coral but not as difficult as its reputation suggests. The most important things are stable water flow, consistent lighting, and regular feeding. It does poorly if it is moved around frequently — once you find a spot where it opens regularly, leave it there. It is more sensitive to water chemistry than true soft corals because it builds a calcium carbonate skeleton. That said, it is not as demanding as SPS corals like Acropora and we have kept and grown it successfully for many years. The key is patience — Pipe Organ takes a few weeks to fully settle into a new tank before it opens consistently.

Pipe Organ Lighting

Pipe Organ Coral does best under low to moderate lighting. In the wild it is found in sheltered reef environments and lagoons where light intensity is reduced. In a home aquarium we recommend placing it in the lower third of the tank or in a shaded position on your rock work. PAR levels of 50 to 150 are appropriate. Under too much light the polyps will stay retracted. Pipe Organ is one of those corals where less light is almost always better than more. The red skeleton is a beautiful display even when the polyps are retracted so the coral remains attractive even if it takes time to open fully in your system. Under blue actinic lighting the polyps, when extended, show a beautiful fluorescent quality that makes the whole colony glow.

Proper Pipe Organ Flow

Low to moderate indirect flow is essential for Pipe Organ Coral. It needs enough water movement to bring food particles to its polyps and keep the skeleton surface clean but cannot tolerate direct, strong flow. The polyps are delicate and will stay permanently retracted if they are being blasted. Random, gentle flow from a wavemaker on a low setting is ideal. We place our Pipe Organ colonies in the most sheltered areas of our display systems — behind rock work or in the corners where flow is softer and more diffuse. If your Pipe Organ is not opening, reducing flow is almost always the first thing to try.

Pipe Organ Growth

Pipe Organ Coral grows slowly compared to most soft corals. Because it builds a hard calcium carbonate skeleton it cannot grow as freely as Xenia, Kenya Tree, or Clove Polyps. New tubes are added gradually to the edges of the skeleton and the colony expands outward incrementally. Do not expect rapid coverage of your rock work — instead appreciate the slow, deliberate growth of a coral that is building something genuinely permanent and architectural. Over years a single frag can develop into an impressive colony with a dramatically structured skeleton. The slow growth also means that frags are more valuable and less commonly available than fast growing soft corals.

Feeding Pipe Organ Coral

This is where Pipe Organ Coral differs most from other soft corals — feeding makes a significant difference. While it is photosynthetic and contains zooxanthellae, Pipe Organ genuinely benefits from regular target feeding and will grow faster, open more readily, and show better colour with supplemental feeding. We recommend feeding with a fine particle food such as Reef Roids broadcast into the tank with flow reduced temporarily so the particles drift down to the extended polyps. Feeding two to three times per week produces noticeably better results than relying on photosynthesis alone. Pipe Organ is one of those corals where feeding is not optional if you want it to truly thrive.

Water Chemistry

Because Pipe Organ builds a hard calcium carbonate skeleton it does consume calcium and alkalinity, though more slowly than SPS corals. We recommend keeping your alkalinity at 7.7 to 8.3, calcium at 420 to 450ppm, and magnesium at 1350 to 1450ppm. Stability matters — sudden swings in alkalinity in particular can cause the polyps to retract for extended periods. Salinity should be kept at 1.026. We dose daily with Atoll in our facility and the consistency it provides makes a noticeable difference in how reliably our Pipe Organ colonies open and grow.

Attaching Pipe Organ Coral To Your Rock

Pipe Organ Coral can be glued directly to rock with reef safe coral glue because it has a hard skeleton. Apply the glue to the base of the skeleton and press it firmly against the rock surface. The coral will begin encrusting over the glue and onto the rock within a few weeks. Choose your placement carefully before gluing — as mentioned above, Pipe Organ dislikes being moved once it has settled in. A flat rock face in a low flow, low-moderate light area of your tank is ideal.

Compatibility

Pipe Organ Coral is peaceful and has no sting. It can be placed near other soft corals and peaceful LPS without issues. It should not be placed directly next to aggressive corals that have sweeper tentacles as the Pipe Organ cannot defend itself and the sweepers will damage the polyps and skeleton. Give it its own space on the rock work with a small buffer from neighbouring corals. Its dramatic red skeleton makes it an excellent focal point coral and it looks particularly striking when framed by zoanthid gardens or mushroom corals around its base.

Propagation

Pipe Organ Coral can be fragged but it requires more care than soft corals because you are cutting through a hard skeleton. Use a bone cutter or a sharp coral frag saw to cut a section of tubes cleanly away from the mother colony. Each section should contain multiple tubes. The cut edges of the skeleton will heal over time. Frags should be glued immediately to a frag plug or rock surface. Because of the slow growth rate and the effort involved in fragging, Pipe Organ frags are less commonly available than soft coral frags and command a higher value. We aquaculture our Pipe Organ in house at our Toronto facility which is why we are able to offer it consistently.

Dipping Pipe Organ Coral

Always dip Pipe Organ Coral before adding it to your tank. A coral dip such as coral rx or two little fishies revive applied for the full recommended time will remove any unwanted hitchhikers. Be gentle during the dipping process — do not shake or agitate the coral aggressively as the polyps are delicate. Check out this video on how to dip corals.