Bubble coral is one of the most distinctive LPS corals in the reef hobby because of its inflated bubble-like tissue, bold texture, and strong showpiece appeal. Often identified in the hobby as Plerogyra sinuosa, Bubble coral can become a standout coral in a reef tank when lighting, water flow, feeding, and water stability are all handled correctly. This guide explains how to care for Bubble coral in a reef tank, including water parameters, lighting, flow, feeding, placement, maintenance, and the most common problems that affect long-term success.

For many reef keepers, Bubble coral is appealing because it looks very different from most other corals. Its fleshy vesicles create a soft inflated appearance during the day, while feeding tentacles often become more visible later. That unique look makes it popular in mixed reefs and LPS systems, but it also means the coral needs careful handling, smart spacing, and protection from excessive flow and aggressive neighbors.

Looking to add a fleshy showpiece coral to your reef tank? Browse our LPS corals for sale and explore healthy corals for your aquarium.

What Is Bubble Coral?

Bubble coral is a large polyp stony coral known for its inflated, bubble-like tissue and visible skeleton beneath. It is prized in reef tanks for its unusual daytime appearance and strong display value.

Because the coral’s tissue is fleshy and exposed, it is more vulnerable to abrasion and excessive flow than many lower-profile corals. That is why placement and spacing matter so much with this species.

Why Bubble Coral Is So Popular

• It has a unique inflated appearance unlike most reef corals
• It creates a dramatic centerpiece look in the tank
• It works well in mixed reefs and LPS-dominant systems
• It offers strong texture and visual contrast
• Healthy colonies can become very impressive long-term display corals

Bubble coral is especially appealing to hobbyists who want a coral with a softer fleshy look instead of branching or encrusting growth.

Water Parameters

Maintaining stable and appropriate water parameters is essential for the health and survival of Bubble coral. Like many LPS corals, it can tolerate a reasonable range, but it does not usually respond well to repeated swings.

• Temperature: 75-80°F
• pH: 8.0-8.4
• Salinity: 1.023-1.025
• Nitrate: keep low and controlled
• Phosphate: keep low and controlled
• Calcium, alkalinity, and magnesium should remain in healthy reef ranges

Stable chemistry is usually much more important than chasing perfect numbers. A Bubble coral in a steady system will almost always do better than one in a tank with constant corrections and parameter swings.

If you are working on chemistry consistency, read our guide on pH and alkalinity in reef tanks.

Lighting

Bubble coral usually does best under moderate to moderately high lighting. Because it contains photosynthetic algae, it depends on light for much of its energy, but too much intensity can stress the coral and increase the risk of bleaching.

• Moderate to moderately high lighting is usually best
• LED lighting works well in many reef systems
• Metal halide can also provide appropriate intensity when managed carefully
• Too much light can stress or bleach the coral
• Too little light can reduce vigor and long-term growth

Most reef keepers get the best results by starting Bubble coral in a lower or middle position and adjusting only if the coral’s expansion and coloration suggest a change is needed.

If you want to learn more about reef lighting, read our guide on how lighting affects coral growth.

Water Flow

Proper water flow is crucial for Bubble coral because it helps remove waste, prevents detritus buildup, and supports nutrient delivery. At the same time, too much direct flow can damage the coral’s delicate tissue.

• Moderate indirect flow is usually ideal
• Too much direct flow can tear or irritate tissue
• Too little flow can allow waste to collect around the coral
• A wavemaker can help create more natural random movement

The best flow usually keeps the coral clean without visibly collapsing or pushing the inflated tissue too hard in one direction. Bubble coral should look expanded and protected, not blasted.

If you want to learn more about proper circulation, read our guide on water flow and coral health.

Placement and Spacing

Bubble coral should be placed in a protected location where it has enough room to expand fully and enough separation from aggressive neighbors. Because its tissue is so fleshy, it should not be placed where it may rub against rock or other corals.

• Place it on a stable surface with room around it
• Avoid sharp rock edges that may damage tissue
• Keep enough distance from neighboring corals
• Allow for both daytime expansion and nighttime tentacle extension

Spacing is especially important because Bubble coral may extend sweeper tentacles and can also be damaged by corals placed too close to it. Giving it extra room from the start usually prevents problems later.

Feeding

Bubble coral is photosynthetic, but it can also benefit from regular feeding. Many hobbyists find that moderate feeding helps support growth, fullness, and overall condition.

• Feed small pieces of fresh or frozen meaty foods
• Shrimp or krill-sized foods are common choices
• Twice weekly is a practical starting point in many systems
• Avoid overfeeding to protect water quality

Feeding should be done carefully and consistently. Too much food can hurt the tank more than it helps the coral, so moderation matters.

Maintenance

Regular maintenance is essential for Bubble coral health. A neglected reef tank usually creates problems first through water quality decline, detritus buildup, and instability rather than one dramatic event.

• Perform regular water changes
• Monitor the coral for signs of bleaching or tissue loss
• Keep debris from collecting around the coral
• Inspect the tank for early signs of stress or disease

Weekly water changes in the 10% to 20% range can be helpful in many systems, especially if coral feeding and nutrient load are increasing. Good maintenance routines usually do more for LPS coral health than last-minute corrective action.

Common Bubble Coral Problems

Bleaching

Too much light, sudden environmental change, or broader stress can cause Bubble coral to lose color and deflate.

Tissue Loss

Tissue recession is often linked to instability, poor placement, excessive flow, or disease pressure.

Brown Jelly and Infection Risk

Like many fleshy LPS corals, Bubble coral can decline quickly if bacterial issues take hold after stress or injury.

Deflation or Poor Expansion

This may be caused by harsh flow, unstable water chemistry, irritation, nearby aggression, or poor overall tank condition.

How to Tell If Bubble Coral Is Healthy

• The tissue expands consistently
• Color remains stable and strong
• There is no obvious recession exposing skeleton
• The coral responds well to stable placement and feeding
• The surrounding tissue looks full rather than damaged or collapsed

A healthy Bubble coral usually looks inflated, settled, and stable in the tank. A coral that remains deflated, torn, or pale for too long is usually signaling a problem with its environment.

Best Tank Setup for Bubble Coral

Bubble coral usually does best in reef tanks with:

• Moderate to moderately high lighting
• Moderate indirect flow
• Stable water parameters
• Clean surrounding conditions
• Enough room for expansion and protection from aggression

It is a strong choice for reef keepers who want a unique fleshy LPS coral with strong display value and are willing to give it the space and stability it needs.

Related Corals You May Also Like

If you are interested in Bubble coral, you may also want to explore other fleshy LPS corals and related reef tank guides:

• Browse LPS corals for sale
• Blastomussa coral care guide
• Euphyllia care requirements
• LPS corals overview
• Find the right coral for your tank

Ready to add a unique fleshy coral to your reef tank? Browse our LPS corals for sale and explore healthy corals for your aquarium.

Shop Bubble Coral and LPS Corals

Explore our WYSIWYG LPS corals, new arrival corals, and featured corals to build a more colorful reef tank.

Final Thoughts

Bubble coral can be one of the most visually striking corals in a reef tank when its lighting, flow, feeding, and water quality are balanced properly. With stable care and careful spacing, it can become a long-term showpiece that adds texture and depth to your aquarium.

Frequently Asked Questions

Q: Does Bubble coral need strong light?
A: Bubble coral usually does best under moderate to moderately high lighting, but excessive intensity can stress or bleach it.

Q: What flow is best for Bubble coral?
A: Moderate indirect flow is usually ideal because it keeps the coral clean without damaging the fleshy tissue.

Q: Does Bubble coral need feeding?
A: It is photosynthetic, but regular feeding with small meaty foods can help support growth and long-term health.

Q: How often should I feed Bubble coral?
A: Twice a week is a practical starting point in many tanks, as long as feeding does not harm water quality.

Q: Why is my Bubble coral shrinking or deflating?
A: Common causes include excessive light, harsh flow, unstable water parameters, irritation, or disease-related stress.

About the Author

Scott Shiles is the owner of ExtremeCorals.com, which he has operated for over 25 years and is recognized as one of the early dedicated live coral websites on the internet. A lifelong reef keeper since 1984, Scott has decades of hands-on experience maintaining marine aquariums and previously owned and operated a brick and mortar aquarium retail store for 10 years, including five years alongside Extreme Corals. He holds a degree in Marine Biology and has personally selected and sold hundreds of thousands of live corals. An avid scuba diver who has explored reef systems around the world, Scott shares practical coral care and husbandry knowledge based on real world reef experience.