Understanding the difference between SPS and LPS corals is one of the most important steps in building a successful reef tank because these two coral groups have very different needs for lighting, water flow, feeding, and long-term stability. While both are stony corals that build calcium carbonate skeletons, they behave very differently in reef aquariums. This guide explains the real differences between SPS and LPS corals, how their care compares, and which type may be the better fit for your tank, your equipment, and your experience level.

For many reef hobbyists, the biggest mistakes happen when corals are chosen based only on appearance. A coral may look amazing online or in a store, but if it needs stronger light, more turbulent flow, or tighter chemistry than your system can provide, it may struggle quickly. Once you understand how SPS and LPS differ, it becomes much easier to stock your tank more intelligently and create a reef that is healthier, more stable, and easier to maintain.

Looking to build a better reef tank with the right coral mix? Browse our SPS corals for sale and LPS corals for sale to find corals that match your setup.

What SPS Corals Are

SPS stands for Small Polyp Stony coral. These corals have small polyps, rigid calcium carbonate skeletons, and often grow in branching, plating, or encrusting forms. SPS corals are usually associated with high-energy reef zones and are especially popular with more advanced reef keepers because of their color, structure, and fast skeletal growth.

SPS corals are often found in shallow, well-lit waters with strong currents, which explains why they usually need stronger light and more turbulent flow in a home aquarium.

What LPS Corals Are

LPS stands for Large Polyp Stony coral. These corals have larger fleshy polyps growing over a hard skeleton, which gives them a more dramatic, inflated, and flowing appearance in the reef tank. LPS corals come in a wide variety of shapes and colors and are often chosen for their movement and strong visual presence.

LPS corals are popular because many of them are more forgiving than SPS corals while still giving hobbyists the beauty and structure of stony corals.

The Main Difference Between SPS and LPS Corals

The biggest difference is in the size of the polyps and what that means for care. SPS corals have smaller polyps and generally need stronger lighting, stronger turbulent flow, and tighter water stability. LPS corals have larger fleshy polyps and are often more tolerant of moderate conditions, especially in mixed reef tanks.

• SPS corals: smaller polyps, higher demands, more sensitivity
• LPS corals: larger fleshy polyps, more visible feeding response, often more forgiving

This difference affects nearly everything else about how they should be kept.

Lighting Differences

Lighting is one of the clearest ways SPS and LPS corals differ in care.

SPS Coral Lighting Needs

SPS corals usually need higher-intensity lighting to maintain color and healthy growth. They are commonly placed in the brightest parts of the aquarium where strong reef lighting is available.

• Often prefer high-intensity lighting
• Usually placed higher in the tank
• Depend heavily on stable light for coloration and growth

LPS Coral Lighting Needs

LPS corals usually do well under moderate to moderately high lighting, and many can thrive in lower-light areas than SPS corals. In many mixed reefs, LPS corals are placed in the lower or middle portions of the aquarium.

• Often prefer moderate lighting
• Can usually handle lower light than SPS
• Too much intense light can damage fleshy tissue

If you want to understand reef lighting better, read our guide on reef tank lighting.

Water Flow Differences

Flow is another major difference between SPS and LPS care.

SPS Coral Flow Needs

SPS corals usually need strong, turbulent, randomized water flow. This helps deliver nutrients, remove waste, and prevent detritus from settling around their branches and surfaces.

• Strong turbulent flow is usually best
• Randomized movement helps mimic reef conditions
• Weak flow can lead to poor health and waste buildup

LPS Coral Flow Needs

LPS corals usually prefer moderate indirect flow. Their larger fleshy polyps can be damaged by strong direct current, so they generally need a gentler environment than SPS.

• Moderate indirect flow is usually ideal
• Too much direct flow can cause retraction or tissue damage
• Enough movement is still needed to keep them clean

The same flow pattern that makes Acropora thrive can easily be too harsh for many fleshy LPS corals.

Water Quality and Stability

Both SPS and LPS corals need good water quality, but SPS corals are usually more demanding when it comes to precision and consistency.

SPS Water Quality Needs

SPS corals usually need very stable alkalinity, calcium, magnesium, salinity, and nutrient levels. They often respond poorly to sudden swings and may show rapid tissue loss or color decline if the tank becomes unstable.

LPS Water Quality Needs

LPS corals still need stable water quality, but many are more forgiving than SPS corals. They can often tolerate a broader range of conditions as long as the tank remains reasonably stable and clean.

If you are working on chemistry stability, read our guide on reef tank water parameters.

Feeding Differences

Feeding style is another area where the two groups differ.

Feeding SPS Corals

SPS corals are primarily photosynthetic, but many hobbyists supplement them with phytoplankton, zooplankton, amino acids, or fine coral foods. These feedings are usually broadcast rather than target-fed directly to individual polyps.

Feeding LPS Corals

LPS corals often show a stronger visible feeding response and can benefit from regular feeding with small meaty foods such as mysis shrimp, brine shrimp, or zooplankton-sized foods.

• SPS usually rely more heavily on lighting and dissolved nutrition
• LPS often respond well to visible target feeding
• Feeding should never come at the cost of water quality

If you want to learn more about coral nutrition, read our guide on feeding different types of corals.

Growth Style and Appearance

SPS and LPS corals also create very different visual effects in a reef tank.

SPS Appearance

SPS corals are known for intricate, rigid growth forms such as branching, plating, and tabling structures. Their beauty often comes from fine detail, dense colony form, and strong coloration.

LPS Appearance

LPS corals are often prized for movement, fleshy expansion, and bold display presence. Their larger polyps create a softer, more animated look in the aquarium.

In general, SPS add structure and reef architecture, while LPS add movement and fleshy focal points.

Common Challenges With SPS Corals

SPS corals are generally considered more demanding. Common challenges include:

• Maintaining stable alkalinity, calcium, and magnesium
• Providing enough strong lighting
• Creating strong randomized flow
• Preventing RTN, STN, and pest issues
• Avoiding rapid changes in nutrient levels

SPS corals usually reward precision and punish instability more quickly than LPS corals do.

Common Challenges With LPS Corals

LPS corals may be more forgiving overall, but they still have their own challenges.

• They can be sensitive to poor water quality
• Some require regular feeding to stay full and colorful
• They may be damaged by excessive direct flow
• Many have sweeper tentacles and need more spacing than hobbyists expect
• Tissue recession can occur if conditions decline over time

LPS corals are often easier than SPS, but they still need a thoughtful and stable environment.

Which Coral Type Is Better for Beginners?

For most hobbyists, LPS corals are the better starting point.

• LPS are often more forgiving of small mistakes
• They usually do not need the same extreme light and flow as SPS
• They still provide strong visual reward and stony coral appeal

SPS corals are often best for hobbyists who already have a mature, stable system and are comfortable maintaining tighter chemistry and stronger reef conditions.

Can SPS and LPS Be Kept Together?

Yes, many mixed reef tanks keep both SPS and LPS corals successfully. The key is planning different zones within the aquarium.

• Place SPS higher in strong light and strong flow
• Place LPS lower or in more protected moderate-flow areas
• Allow enough room between aggressive LPS and delicate SPS
• Plan for future growth and shading

A mixed reef can be beautiful, but it requires more planning than a tank built around only one coral style.

How to Choose Between SPS and LPS for Your Reef Tank

Before choosing, ask yourself:

• How stable is my tank?
• How strong is my lighting?
• How much flow can I provide?
• How experienced am I with reef chemistry?
• Do I want movement and fleshiness or structure and branching growth?

If you are newer to reefkeeping, LPS corals are usually the smarter place to begin. If your tank is mature and you want a stronger SPS challenge, then SPS may be the right next step.

Related Corals You May Also Like

If you are learning the differences between SPS and LPS corals, these related guides may also help:

• Browse SPS corals for sale
• Browse LPS corals for sale
• Acropora care guide
• Montipora care guide
• LPS corals overview

Ready to choose the right coral type for your reef tank? Browse our SPS corals and LPS corals to find a better fit for your aquarium.

Shop SPS and LPS Corals

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

Final Thoughts

SPS and LPS corals are both beautiful, but they reward different kinds of reefkeeping. SPS corals usually require higher light, stronger flow, and tighter stability. LPS corals often offer more forgiving care, stronger feeding response, and fleshy movement that makes a reef tank feel alive. Once you understand the differences, you can choose corals more confidently and build a reef tank that is both healthier and easier to maintain.

Frequently Asked Questions

Q: What is the main difference between SPS and LPS corals?
A: SPS corals have smaller polyps and usually stricter care requirements, while LPS corals have larger fleshy polyps and are often more forgiving.

Q: Are SPS corals harder to keep than LPS corals?
A: Usually yes. SPS corals generally need stronger lighting, stronger flow, and more stable parameters.

Q: Do LPS corals need feeding more often than SPS corals?
A: Many LPS corals benefit more visibly from direct feeding, while SPS corals usually rely more heavily on lighting and fine suspended foods.

Q: Can SPS and LPS corals live together?
A: Yes. Many mixed reef tanks keep both successfully, but placement, spacing, and flow zones matter a lot.

Q: Which coral type is better for beginners?
A: LPS corals are usually a better starting point for beginners.

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.