Green chromis reef compatibility check
Chromis viridis
Green chromis (Chromis viridis) are beginner-level chromis that need at least 30 gallons. They are listed as reef safe; groups can dwindle from aggression or stress. Temperament is peaceful and adults reach about 4 inches. ReefCrafter schedules them as middle-stage livestock, with no tank-age gate beyond a finished cycle.
Peaceful schooling-looking fish, but group dynamics are less simple than beginners expect.
Who it is for
Good fit for
- ✓ Tanks of 30+ gallons at the animal's adult size.
- ✓ Beginners following a slow, planned stocking order.
- ✓ Newly cycled tanks with a compatible stocking list.
- ✓ Reef tanks with corals and invertebrates.
Not a fit for
- ✕ Tanks under 30 gallons, even while it is small.
- ✕ Groups can dwindle from aggression or stress.
Compatibility warnings
- Groups can dwindle from aggression or stress.
- 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 30 gallon minimum as an adult-planning floor; display length, aquascape, and existing tankmates can raise that floor.
- This can be planned early after cycling, but only after quarantine/acclimation logistics and stocking order are settled.
- Professionals should model aggression by territory and introduction order, not only by care level.
Tank fit and maturity gate
ReefCrafter uses 30 gallons as the planning floor for adult size, swimming room, nutrient load, and aggression margin.
This species can be planned early when the tank is cycled and the rest of the stocking list is compatible.
Care notes
- Temperament
- Peaceful
- Reef safety
- Safe
- Adult size
- 4 in
- Placement
- Build dependent
- Diet
- Build dependent
- Flow
- Varied
- Light
- None
- Bioload
- 1
- Stocking stage
- Middle
Related species
- Azure damselfish
Same 30-gallon floor.
- Banded pipefish
Same 30-gallon floor, expert care, reef caution.
- Banggai cardinalfish
Same 30-gallon floor.
- Dragonface pipefish
Same 30-gallon floor, expert care, reef caution.
Equipment that fits
- Coralife BioCube 32 LED Aquarium
32-gallon display, above this animal's 30-gallon floor.
- Fiji Cube 32 Gallon Rimless AIO Glass Nano Tank PRO Series
32-gallon display, above this animal's 30-gallon floor.
- Fluval Flex 32.5 Gallon Aquarium Kit
32-gallon display, above this animal's 30-gallon floor.
Related reading
Questions
What size tank do green chromis need?
ReefCrafter plans for at least 30 gallons, based on an adult size of about 4 inches, plus swimming room, nutrient load, and aggression margin. Use the adult size, not the size at purchase.
Are green chromis reef safe?
They are listed as reef safe in ReefCrafter's catalog. Watch for: Groups can dwindle from aggression or stress.
Are green chromis good for beginners?
Yes. They are rated beginner care.
When should I add green chromis to my tank?
ReefCrafter treats it as middle-stage livestock, with no tank-age gate beyond a finished cycle. Add livestock slowly so nutrient export keeps up.