InvertExpert care100g minimum
Sand sifting starfish reef compatibility check
Astropecten polycanthus
Commonly sold but frequently inappropriate for young starter reefs.
Minimum tank
100 gallons
Care level
Expert
Reef safety
Caution
Bioload score
0.6
Stocking stage
Middle
Flow need
Varied
Light need
None
Compatibility warnings
- Often starves in small or young sandbeds.
- Avoid for most beginner tanks.
- Check adult size against the final tank, not the fish or coral at purchase size.
- Add livestock slowly so the bioload and nutrient export can keep up.
- Use the planner when this animal changes the tank-size, flow, lighting, or stocking plan.
Professional planning context
- Use the 100 gallon minimum as an adult-planning floor; display length, aquascape, and existing tankmates can raise that floor.
- Hold this entry until the system has at least 9 months of maturity or equivalent stability evidence.
- Invert plans should account for copper exposure, acclimation sensitivity, predation risk, and whether the tank can actually feed the animal.
Tank fit and maturity gate
Tank minimum
100 gallons
ReefCrafter uses 100 gallons as the planning floor for adult size, swimming room, nutrient load, and aggression margin.
Maturity gate
9 months
This animal should wait until the tank has enough age, food web stability, or parameter history.
Care notes
- Temperament
- Varied
- Reef safety
- Caution
- Adult size
- 8 in
- Placement
- Build dependent
- Diet
- Build dependent
- Flow
- Varied
- Light
- None
- Bioload
- 0.6