The fish is painted in a greenish-silver color. The upper part of the body is olive green and the lower part is light gray. Gill covers are painted in golden green. An iridescent greenish streak runs along the sides. At the base of the tail unit there is a dark spot, over which there is a bright golden dot similar to a flashlight. The fins are colorless. The first ray and the ends of the dorsal fin are colored dark. The anal fin is colorless with a few dark dashes. There is a black adipose fin. Males are slimmer than females. Females are larger and have a rounded abdomen. In aquarium conditions, the fish size reaches 4-4.5 cm.
Costello - schooling, moving fish. In order to maximally simulate the conditions of their living in nature, it is advisable to create an imitation of the flow using an aerator or water purifier in the aquarium. Fish are very beautiful, especially their attractiveness is manifested in lateral front lighting. In order for the fish to always please with a beautiful color, the water must be old peat rich in tannic and humic substances. It should be noted that the color of the fish depends on their emotional state, with the slightest fright, the green iridescent strip on their body instantly becomes faded. Most of the time the fish spend in the middle and lower water layer, floating to the surface of the water only during feeding.
Green neon need to be kept in a flock of at least 8-10 fish. When they are kept in a common aquarium with other peace-loving fish, neons will very strongly stand out against their background with their bright color. It must be borne in mind that neons are small and small fish are suitable for their neighbors; otherwise, large fish can eat them. The volume of the aquarium for neon should be calculated based on the required 15-20 liters per pair. It is desirable that the back of the aquarium and the ground are dark in color, so the fish will look much more interesting. In the back of the aquarium and on its sides you need to plant a variety of plants, including floating ones. At the bottom you can put a grotto or large stones.
Green neon is very sensitive to the chemical composition of water and does not tolerate sharp temperature fluctuations. So at temperatures below 20 ° C, as well as with its sharp fluctuations within 6-7 ° C, fish can die.
The church is fed with live and dry food (bloodworms, cyclops, daphnia, both live and frozen). In natural habitats, green neon feeds on various small insects that fall on the surface of the water, as well as small crustaceans.
Neon green reaches its maturity at the age of 8-10 months. Fish spawn usually between October and January.
I want to note right away that breeding these fish is a rather difficult task. To do this, choose a spawning aquarium with a volume of about 20 l and having a length of 30 cm. The side and back walls of the spawning must be shaded. In no case should you allow the sun to fall into the aquarium. Several bushes of cryptocoryne, Ceylon fern and Javanese moss are planted in the spawning ground. The water level should be at the level of no more than 20 cm. The water temperature in the spawning grounds should be in the range of 26-27 ° С.
In the process of spawning, the female spawns about 15-250 small eggs. Immediately after spawning, the producers are planted, and the spawning is completely shaded. caviar is incubated for 24-36 hours, and after about 4-5 days tiny fry appear, which immediately begin to swim and eat. At this time, gradually increase the intensity of lighting, which in the end should not be bright.
The fry are fed with rotifers, live dust and ciliates. With proper feeding, fry grow very quickly.
Life expectancy of green neon in aquarium conditions is about 5 years.
Description of the genus "HEMIGRAMMUS (Hemigrammus)"
Order: Carp-shaped (Cypriniformes)
Inhabit shallow reservoirs with flowing and still water of the tropics of South America.
The body is moderately elongated, strongly flattened laterally. The lateral line is incomplete. There is a small adipose fin. Anal fin longer than dorsal, caudal fin two-lobed.
Peaceful, schooling fish can be kept in a common aquarium.
Water: 23-25 ° C, dH up to 15 °, pH 6-7.5.
Feed: lively, additionally vegetable, substitutes.
Spawning aquarium with a separator mesh at the bottom and plants with an elongated stem and dissected leaves.
Water: the temperature is 2-3 ° C higher than at the content, dH up to 5 °, KH up to 1 °, pH 6-6.5, level 15-20 cm.
Females and males are kept separately 2 weeks before landing for spawning. To spawn in the evening they plant a couple or a group of fish. Spawning is usually in the morning, the female catches 200 or more eggs. After spawning, the fish are removed, the aquarium is darkened, the water level is reduced to 10 cm. The incubation period is 1-2 days, the fry swim after 3-6 days. Give dim lighting.
Starter feed: ciliates, rotifers.
Puberty at 6-10 months.
Neon green: keeping and breeding fish.
Photo: Hemigrammus hyanuary
Photo: Hemigrammus hyanuary
It lives in Brazil.
Sexual differences are weak. When transplanting, the males cling to the net with the anal fin.
Content is the same as others neon.
Dilution water: dH up to 2 °, pH 6.0, t 24-26 ° C. Carbonate hardness is minimal.
Spawning is applied the same as for neon red. A small bush of a Thai fern is placed in the center. Spawning occurs in the twilight and may not occur immediately. After spawning, the producers are removed and the spawning is shaded. The fry begin to swim on the 5-6th day. Feed them the same way as fry neon simple.
Green Neon, or Neon Costello (Hemigrammus hyanuary)
Green Neon, or Neon Costello (Hemigrammus hyanuary) - fish of the Characidae family, genus Hemigrammus.
Habitat: South America (Brazil). It inhabits the middle and upper reaches of the Amazon River and Lake Yanuari.
The body is low, elongated, flattened laterally. The caudal fin is two-bladed. There is a small adipose fin. Anal fin extended. The main body color is greenish-silver.
The back is olive green. A greenish streak stretches along the side line. The ventral and pectoral fins are colorless. At the base of the caudal fin there is a black spot above which a golden flashlight is located. Anal fin in front with white edging. The eyes are silver-green, the gill covers are golden green, the abdomen is silver-white.
Sexual differences: the male is smaller and slimmer than the female, brighter colored.
The size of neon green is up to 4 cm.
Neon is green neon, or neon Costello is a schooling, moving and peaceful fish. Costello is a rather shy fish. During stress, the bright green streak on the neon body dims and its color becomes less attractive. It is desirable to contain a flock consisting of at least 10-15 individuals. Get along well with other species of haracin fish. It should not be kept with large species of fish, since neons can easily become prey for them.
For green neon content (costello) minimum aquarium volume is required at the rate of 15-20 liters per pair of individuals. Neon green can jump out of the aquarium, so the aquarium is covered with coverslip. Overgrown plants are needed (including floating ones), which are planted along the rear and side walls of the aquarium, while leaving behind free space for swimming.
As shelters use caves made of stones, driftwood, ceramic pots. The soil and background of the aquarium are desirable in dark colors.
Aquarium lighting is moderate, top, front - it is under such lighting of neon green that it feels comfortable and looks very bright and colorful. They do not like strong currents and prefer to stay in areas with relatively calm water.
Filtration, aeration and weekly replacement of up to 25% of the water volume are required. It is advisable to install a peat filter (or add peat filtrate) and monthly (1-2 times a month) change up to 10-20% of the water volume.
Disease predisposition: Neons are predisposed to plistophorosis (neon disease), just as neons do not tolerate chlorine dissolved in water. When treating other diseased fish in the same aquarium with neons, it must be remembered that they have an increased sensitivity to copper-based drugs, therefore when using the drug in a general aquarium, the dosage should be halved from the one recommended in the instructions.
Under natural conditions, it feeds on insects falling on the water surface and small crustacean species. In the aquarium, it eats live (frozen cyclops, small bloodworms, artemia, daphnia, mosquito larvae) and dry (flaky) food. Neons are prone to obesity, therefore, one-time meals are recommended for adult neons. It is advisable to do a fasting day once a week (do not feed the fish at all).
Costello spawns or neon green throughout the year. For breeding green neon, or neon costello An elongated (from 40 cm long) aquarium is needed, into which soft water is poured to a level of 15-20 cm. When preparing a spawning aquarium, it must be sterilized. A spawning substrate may be a bush of Javanese moss or Thai fern. Dilution water: dH up to 5 °, pH 6.0, KH up to 1 °, water temperature 24-26 ° C.
Females and males are kept separate for 2 weeks before landing for spawning with plentiful feeding by bloodworms. To spawn in the evening they plant a couple or a group of fish. The next morning, spawning occurs. Productivity: up to 250 eggs. After spawning, the fish are removed, the aquarium is darkened, the water level is reduced to 10 cm. The incubation period is 1-2 days, the fry swim in 3-6 days. Give dim lighting. Starter food for fry: ciliates, rotifers, artemia nauplii. After a month, the fry of Hemigrammus hyanuary acquire the usual color for these fish. In a growing aquarium, the temperature is constantly maintained at the same level - 26-27 ° C, lowering the temperature by 3-4 degrees will lead to the death of fry.
Green neon becomes sexually mature at the age of 6-10 months.
Origin: South America
Water temperature: 22-25
Hardness: up to 15
Habitat layers: upper, middle