Coral care guide
Chalice Coral Care Guide
Chalice corals bring fluorescent rims, contrasting eyes and spreading plates to lower parts of the reef. Most appreciate modest light, indirect flow and enough personal space to keep their nighttime behavior from becoming everybody else’s problem.
The sweepers come out after the store lights are off. Very convenient for the chalice.
First: chalice is a trade name
“Chalice” is an aquarium trade grouping, not one scientific genus. Corals sold under the name may include Echinophyllia, Mycedium, Oxypora and related plating or encrusting stony corals. Pectinia and other corals are sometimes placed under the same retail umbrella even though their structure and behavior can differ.
That variety is why one universal PAR number or feeding rule does not fit every chalice. Use the coral’s source conditions, tissue inflation, growth edge, coloration and aggression as your final guide.
Quick care guide
| Requirement | Recommended starting point |
|---|---|
| Care level | Easy to moderate; species dependent |
| Lighting | Low to moderate; roughly 50–150 PAR |
| Flow | Low to moderate, indirect and varied |
| Placement | Lower to middle reef on a stable surface |
| Feeding | Optional but beneficial; small meaty or particulate foods |
| Temperament | Aggressive; allow room for sweepers and mesenterial filaments |
| Temperature | 76–79°F |
| Salinity | 1.025–1.026 specific gravity |
| Alkalinity | Approximately 7–9 dKH, kept stable |
| Calcium | Approximately 400–450 ppm |
| Magnesium | Approximately 1,250–1,400 ppm |
| Nutrients | Detectable nitrate and phosphate without abrupt swings |
These are starting points. A thin plating Oxypora and a fleshy Echinophyllia may not respond identically, even when both were sold from the same “chalice” section.
Lighting
Begin most chalices in lower-to-moderate light. Around 50–150 PAR is a practical starting range when source conditions are unknown, with new arrivals placed toward the lower end and acclimated slowly.
Some specimens adapt to brighter conditions, while others naturally occur in protected or deeper habitats. Excess light or a rapid increase may cause paling, bleaching or tissue recession. Insufficient light can contribute to darker tissue, reduced growth or less contrast, but nutrients and spectrum also influence color.
Move slowly and compare progress under consistent lighting. A fluorescent rim photographed under blue LEDs will not look identical under a white-heavy daytime spectrum.
Water flow
Use low-to-moderate indirect flow. The goal is enough movement to keep sediment and waste off the surface without folding tissue against the skeleton or preventing normal feeding behavior.
Plating and cup-shaped colonies can collect debris. If material settles repeatedly, increase varied circulation or adjust the coral’s angle rather than aiming a pump directly at it. Strong laminar flow can damage delicate tissue along ridges and growth edges.
Placement and tissue protection
Place the coral on stable rockwork or a secure lower position where snails and fish cannot tip it. Keep fleshy tissue away from sharp rock and coarse substrate. A chalice placed directly on an abrasive surface can suffer damage along its expanding edge.
Consider its future growth direction. Many chalices encrust or plate outward, making them difficult to move after they establish. Leave open space around the perimeter and maintain access for cleaning and inspection.
Aggression and spacing
Chalices can extend sweeper tentacles or mesenterial filaments beyond the visible daytime tissue. Several inches of space is a sensible minimum, but some colonies require more. Inspect the reef after lights-out before assuming the daytime gap is safe.
Do not assume two chalices are compatible because they share a retail label. Contact between different colonies can damage one or both, and a rapidly growing edge may reach a neighbor sooner than expected.
Feeding
Chalices are photosynthetic, but occasional feeding can support tissue and growth. Offer small portions of mysis, finely chopped seafood, quality frozen blends or appropriately sized LPS pellets once or twice per week when feeding tentacles are visible.
Reduce strong flow briefly, place food near the mouths without pressing into the tissue, and restore circulation after the coral has had time to respond. Food should be small enough to swallow easily. Remove or reduce excess if it is rejected or begins collecting around the colony.
Water chemistry and stability
Chalices need stable reef chemistry to maintain tissue and build skeleton. A practical starting foundation is alkalinity around 7–9 dKH, calcium around 400–450 ppm, magnesium around 1,250–1,400 ppm, temperature around 76–79°F and salinity around 1.025–1.026.
Maintain detectable nitrate and phosphate rather than stripping the aquarium completely clean. Very low nutrients can contribute to pale tissue and poor resilience, while chronic excess can suppress color and support algae around exposed skeleton. Make corrections gradually.
Acclimating a new chalice
- Inspect the tissue, growth edge, underside and mounting surface under white light.
- Follow a trusted coral-dip protocol and the product’s current directions.
- Begin in lower light with gentle, indirect flow.
- Keep the coral clear of sand, sharp rock and aggressive neighbors.
- Allow it to settle before feeding heavily or moving it repeatedly.
- Increase light only after tissue remains full and the growth edge looks stable.
A recently shipped chalice may look flatter or less fluorescent for a short period. Look for steady improvement rather than expecting display-tank color on arrival day.
Reading the coral
Healthy signs
- Tissue fully covers the skeleton and growth edge
- Mouths remain intact without persistent gaping
- Color remains stable under consistent lighting
- Feeding tentacles or a clear feeding response appear regularly
- A clean, expanding rim develops around the colony
Warning signs
- Fresh white skeleton along the rim or between eyes
- Tissue lifting, peeling or collecting brown material
- Persistent gaping mouths
- Bleaching after a lighting change
- Damage on the side facing a pump, rock or neighboring coral
- Algae establishing on recently exposed skeleton
Troubleshooting
| Symptom | Check first | Practical response |
|---|---|---|
| Receding edge | Abrasion, direct flow, aggression, instability | Protect the edge and correct the confirmed stressor |
| Paling or bleaching | Recent light increase, temperature, low nutrients | Reduce abrupt stress and acclimate gradually |
| Stays deflated | Handling, salinity, alkalinity, direct flow | Verify stability and stop repeated relocation |
| Tissue damage on one side | Pump direction, rock contact, nearby coral | Redirect flow or create more space |
| Algae on skeleton | Previous tissue loss plus light and nutrients | Address the cause of recession and keep the area clean carefully |
| Refuses food | Stress, excessive flow, oversized food | Try smaller food after lights dim and reduce flow briefly |
Rapid tissue loss or brown gelatinous material is urgent. Isolate the coral when practical, avoid sharing contaminated tools or water, and verify critical parameters immediately.
Final take
Start a chalice in modest light and indirect flow, protect its tissue, give it more nighttime space than you think it needs, and keep the reef stable. Feed small portions when useful and let the coral’s response—not the trade label—determine the final placement.