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Blue Green Chromis

Chromis viridis

Marine Marine Indo-Pacific

A green marine damsel that shoals above the reef. One of the gentler damsels, it is best kept in groups of six or more, or alone. Large groups need a tank with plenty of open water.

Also called: Blue green damselfish, Blue green chromis, Blue puller.

9 cm adult length, drawn to scale. deep body.

Saltwater species. The planner judges it with a marine rule set. A reef or fish-only tank takes months to mature and costs more to run than freshwater. See the marine page.

Try it in the planner Opens a tank sized to its minimum with 6 fish added.

What it needs

ItemValueBecause
Adult length 9 cm Used for the Space check: the tank must be long enough for the fish to turn round.
Smallest tank 150 L, at least 90 cm long estimated The least water and floor length this species is kept in for good, as a single fish or smallest group.
Extra water per added fish 15 L estimated What each further fish adds once the minimum is met.
Waste load Class 2 of 5 estimated How much waste an adult makes against its size. Feeds the Load check.
Temperature 23 to 28 C Stock sharing a tank need overlapping ranges.
pH 8.1 to 8.4 Compared with tankmates in the Water check.
Hardness GH 8 to 12, KH 8 to 12 Degrees of general and carbonate hardness.
Flow Medium Low-flow fish are stressed in a strong current.
Light Bright Matched to the lighting class on the needs sheet.
Group size At least 6, ideally 8 Kept alone or in small numbers it hides, fades or turns on tankmates.
Temperament Peaceful Territorial: weak.
Swims in Upper water Fish that use different levels share a tank more easily.
Lifespan About 8 years A fish is a long commitment.
Experience Suits a first tank A guide to how forgiving the species is of mistakes.
Salinity Marine, about SG 1.023 to 1.025 Needs salt water, a different build and a longer-running tank than a freshwater set-up.

Tags marked estimated are judged from the size and habits of the species rather than measured, so treat them as a sensible default.

Diet and tank layout

Blue Green Chromis is an plankton feeder that swims in the upper water. It is safe with plants. Give it some cover.

Tankmates

Works with

No close matches in the data. Check the pair tool.

Depends

Avoid

Compare any two fish on the compatibility page, or print the equipment for a stock on the needs sheet. How this is worked out: the method.