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Green Chromis Care Guide: Tank Setup, Aquarium Mates – 2021

 

The Green Chromis has gained widespread attention because of its energetic persona and dazzling appearance. They belong to the Damselfish, infamous for their aggression, but the green shaded Chromis is the polar opposite. It is docile, playful, and gets along with most fish.

 

Green Chromis are ideal for fishkeepers with some experience of caring for saltwater fish. If you want to keep one in your marine tank, here is our in-depth guide to help you care for it.

 

Category Rating
Level of Care Beginner to Intermediary
Temperament Extremely peaceful
Appearance A shade of green with light bluish hues
Life Expectancy 8 years or more if properly taken care of
Size Reach a size of 4 inches maximum
Diet Omnivorous species
Family Pomacentridae
Tank Size 30 gallons
Tank Environment Marine tank with a compatible reef and friendly fish
Tank Mates Very peaceful with other community fish

 

About Green Chromis

 

Green Chromis originate from lagoons under tropical and subtropical waters throughout the Pacific Ocean and the Indian Ocean, including Madagascar, Indonesia, and the Red Sea. They thrive in groups because of their docile nature. This reef fish prefers to live in saltwater and spends most of its time in areas such as corals and lagoons.

 

It would help if you strived to mimic an oceanic ambiance with ocean rocks, caves, reefs, sea plants, and corals for the comfort of your Green Chromis.

 

green chromis

 

Green Chromis Appearance

 

 

Aquarists can’t get enough of their blue-green appearance, which has no discernable markings. The male Green Chromis may change his colors during the breeding season, turning a pale yellow color before building a nest.

 

The average Green Chromis size is 3 inches in captivity, while the wild ones grow up to 4 inches. It allows beginners to keep them in smaller tanks. The Green Chromis is sometimes confused with the Black Axil Chromis, which has a slender, slightly longer body. It also features a black spot on its pectoral fin, hence the name.

 

The Blue-Green Chromis has a prominent forked tail, which allows it to stand out in a tank. The tail may change color in mature males when he’s ready to build his nest.

 

Green Chromis Behavior

 

The Green Chromis is known for its exciting personality and loves to swim around at breakneck speeds. They’re very active and mesmerizing to watch in groups while they glide around the tank’s corals in sync with each other. While the vast majority of Damsel species are known for their aggressive temperaments, the Green Chromis is the exception to the norm.

 

They are reasonably passive and can be kept with other community fish. These guys prefer to live in shoals of at least six or more other Green Chromis. If you observe them, they tend to spend most of their time occupying the middle portion of the tank (choose tank mates that swim in the tank’s top and bottom areas).

 

You can also see them playing with each other as they playfully dart across the tank. When tired, Green Chromis sleep inside the coral, making sure they have lots of space to move around.

 

Their hostile nature takes over when it’s breeding season, though – so watch them closely during this time because they will turn aggressive to one another and fight.

 

Green Chromis Tank Mates

 

The peaceful Green Chromis can share the same space with most fish, excluding large territorial fish that may mistake the smaller Green Chromis as prey.

 

When adding tank mates to the marine aquarium, you should always start by adding the most peaceful fish first, working your way up to the most aggressive fish species that make your Chromis’s life miserable.

 

It is an efficient way to keep the in-fighting down and also prevents territorial disputes. Green Chromis mostly leaves invertebrates like crabs and shrimp alone and do not bother corals, so this species thrives well in the reef and fish-only tanks.

 

Of course, the most impressive thing to see in your marine aquarium is a shoal of Green Chromis. They’ll flash bright blues and greens at you as they dart from one area of the tank to another.

 

Green Chromis are an intelligent species and quickly form hierarchies within their school, almost like a pecking order for chickens. Dominant Green Chromis will be at the top of the hierarch while the weakest ones will be at the bottom.

 

Having six in the same space is essential if you want to keep aggression from ‘alpha’ Chromis at bay. There’s power in numbers, and it also minimizes the aggression.

 

Below is our list of the friendliest saltwater tank mates for Green Chromis:

 

 

Tank Requirements and Conditions

 

Green Chromis occupy the middle portion of the tank and don’t like to swim on the tank’s surface. Their tank should mimic their natural habitat, surrounded by sea plants, rock works, caves, Acropora, and various other corals. It will make your Green Chromis comfortable.

 

Do not keep the tank overcrowded if you want your Green Chromis to feel safe in the tank. The ideal size is about 30 gallons for this peaceful 4” fish.

 

However, it is recommended to keep around 6 Green Chromis in a tank to prevent in-fighting and bullying. If you decide to keep 6 of them, consider upgrading to a 60-gallon tank. It is an active swimmer and requires tons of space to move in a tank.

 

The most important part of the tank is the water, of course. Should keep it at around 73 to 81 degrees Fahrenheit. Must maintain the pH value of the tank slightly alkaline 8.2 to 8.4. Keep the water hardness between 9 to 11 dGH.

 

To clean the tank and all the objects within it, use liquid soap. The best way to clean the corners of the tank is to use a soft brush. It is recommended to clean the tank once every month.

 

Cleaning doesn’t necessarily mean taking out the entire water from the aquarium. It’s sufficient to partially change 25% of the water without harming the Green Chromis or upsetting its habitat.

 

If you feel the need to clean out the entire tank, then remove all the fish using a fishnet and keep them in a separate tank during the cleaning process. It will be needed when the tank degrades in quality.

 

green chromis tank

 

Tank Setup: Things to Add

 

 

With just a tiny bit of research and planning, you can build a thriving ecosystem that’s entertaining to watch and makes a great addition to your home.

 

Saltwater fish may sometimes visit the bottom of the tank to rest on the substrate. For this reason, it is advisable to keep a sandy substrate to minimize the damage done to the fish. Chromis is a little shy and prefers to hide when stressed out. Please provide them with lots of caves and rocks in the marine aquarium, so they don’t feel threatened.

 

There aren’t many unique requirements for Green Chromis fish in terms of lighting because they’re not very fond of lights in their home.

 

Install an advanced filter that can maintain the water’s quality to keep your Green Chromis healthy and happy.

 

Consider tucking a few aquatic plants in the aquarium to create a natural-looking marine tank and make them look good. Here is our round-up of 5 low-maintenance plants:

 

Red Mangrove Propagule 

Red Mangrove trees are found in most tropical oceans around the world. They help to lower the nitrate levels in a tank but require iron supplements to do so. With proper lighting, they should take hold of your tank pretty soon.

 

  1. Halimeda

 

Since they’re found in most oceans worldwide, the Halimeda plant looks good in most marine tanks. It is attractive to look at the unusual leaves that look like coins stacked together like a chain. Some people also call them ‘money plants’ because of their shape.

 

  1. Green Finger Algae

 

These plants are great for most saltwater tanks because of their unusual bright green color and lush, dense appearance. They are hardy and add a bit of variety to most aquariums.

 

  1. Red Gracilaria Algae

 

If you’re encountering difficulty keeping balance in your aquarium, you may want to add the Gracilaria. This plant effectively fights off algae’s growth and can even be fed to herbivorous fish in the tank. All you to do is anchor it to the tank using a firm surface such as a rock so it can quickly gain stability.

 

green chromis feed

 

 

What do Green Chromis Eat?

 

 

Because they are an omnivorous species, the green Chromis diet includes both plants and animals. They’re known for scavenging after their food in the wild, including eating larvae, copepods, zooplankton, algae, and phytoplankton.

 

They also like to eat fish eggs that haven’t yet hatched. Since they’re not such picky eaters, you can feed them with a varied diet.

 

They will eat pellets, meat, flakes, frozen food, and vegetables. They love eating Mysis shrimp and Krill. If you want them to retain their color, use some liquid vitamins to ensure they stay bright and vibrant. Supplement their regular diet with fresh vegetables finely chopped into little pieces or buy some vegetarian flake.

 

It is recommended to feed them at least three times a day if you’ve got a large tank. For a smaller tank, you can provide them once a day only. Abstain from overfeeding your Green Chromis because this will alter the water’s quality and contribute to their early demise.

 

Breeding Green Chromis

 

Green Chromis are easy for beginners to breed but will turn aggressive as their wild nature takes over during the spawning season. It is recommended to separate them in a special breeding tank to prevent other fish harm. Green Chromis is a hardy species and will survive the initial shock of being transported to a new tank.

 

The tank conditions need to be ideal to initiate breeding, and there must be no predators in the tank to eat the eggs. During the breeding process, the male will create a nest to secure a place for his eggs. The male and female pair will engage in a mating ritual where they dance in rapid swimming patterns and fin movements.

 

Males will turn much darker during this process. The female will then lay a large number of eggs that will then get fertilized by males. Unlike most fish, Green Chromis parents will tend to their nest and protect their eggs until they hatch a few days later.

 

The unfertilized eggs will get eaten by males. Once the Green Chromis fry hatch, it becomes essential to save them from other fish breeds by keeping them in a separate tank with their parents.

 

Diseases and Dangers

 

Their immune systems are relatively robust, but Green Chromis are reasonably susceptible to the following diseases:

  • Marine ich
  • Crypt marine velvet
  • Fungal infections
  • Viral diseases
  • White spot

 

Can prevent most of the diseases with a varied diet, right water conditions, and good hygiene. If you suspect your Green Chromis of any of the above diseases, take them to a vet for recommendations on the best course of action.

 

The tank should be cleaned twice a month to maintain proper hygiene. Use a fish net to hold them very carefully, so they don’t feel stressed out or scared.

 

Variants of Chromis You Should Know About

 

  1. Brown Chromis

 

Brown Chromis are usually found in the Western Atlantic Ocean and the ocean near Ascension Island. As their name suggests, they are dark brown, which is in stark contrast to the Blue-Green Chromis.

 

  1. Lemon Chromis

 

Lemon Chromis are found near the Indonesian oceans. They’re the same as Green Chromis except, they sport a yellow-green appearance. They are only 3 inches in size, making them ideal for beginners.

 

  1. Black Axil Chromis

 

They have the same color and pattern as Green Chromis, but they have a slender shaped body by comparison. They are found in the South Pacific Ocean and thrive in the middle column of the tank. Aquarists like them because of their docile nature and small size. They are omnivorous and will eat both vegetables and meat.

 

  1. Paletail Chromis

 

They are huge compared to most Green Chromis, often twice as big 6 inches long. They’re also more aggressive and are only recommended to expert fishkeepers. Paletail Chromis sport a light-yellow tail with a dark blue body, making them attractive in any marine tank.

 

  1. Half and Half Chromis

 

These fish are known as Half and Half Chromis because they combine two colors in equal parts – half brown and half white.

 

It is a rare color combination for freshwater species and has been a subject of much attention in the last few years. They are usually found in the Red Sea in regions near Australia. They typically scavenge for food in the wild, making them ideal tank cleaners.

 

  1. Orang Lined Chromis

 

This species of the Chromis has main light orange lines on its body with a pale blue appearance. Adults will change their color to brown with a white-shaded tail. They are native to the Indian Ocean and are relatively rare in most markets. They are small, peaceful in size, and attractive, three features that make aquarists love any fish species.

 

Is Green Chromis Aggressive?

 

Green Chromis are peaceful for the most part and do not turn hostile unless they are stressed because of low water conditions, poor hygiene, lack of space in the aquarium, or being bullied by other fish. They also turn aggressive during the breeding season and may attack other fish.

 

Is Green Chromis Hardy?

 

Green Chromis are very hardy and will relatively easy to keep. They do well in most aquariums and don’t require special apparatus or lighting.

 

Where to Buy Green Chromis?

 

Green Chromis for sale can be abundantly found in most marine pet stores, online stores, and online forums. If you want to search for rarer breeds, look at online forums for specialist breeders known for carrying them.

 

Most marine fish are generally expensive, and the Green Chromis is no exception. Most pet stores will sell them for about $9. Before buying the Green Chromis, inspect them for any signs of disease. Their appearance should match the description, and they should be reasonably active. If the Green Chromis are unusually quiet in the tank, it may indicate disease and illness signs.

 

green chromis tank mates

 

Wrapping Up: Are Green Chromis Ideal for Your Marine Tank?

 

 

Unlike most Damsel family species, the Green Chromis is very peaceful and perfect for beginners new to saltwater fish keeping. Just make sure to provide them with a varied diet.

 

Bonus points if you can provide them with a 60-gallon tank. They’re fairly robust and will make your tank stand out.

 

The average Green Chromis lifespan is about eight years or more, so they will reward you for taking care of them.

 

Click here to know the 30 most popular Fish for your aquarium.

 

 

 

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