Filamented Dartfish
Ptereleotris hanae
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Water parameters
Maintaining a stable and appropriate temperature is critical for the survival of aquatic life.
pH 7.8 - 8.4 potential of HydrogenMeasuring the acidity or alkalinity of water on a 0–14 scale, where 7 is neutral, 7 is alkaline.
NO3 1-20 ppm NitrateWhile less toxic than ammonia, high nitrate levels (above 40–80 ppm) are important to monitor because they can cause fish stress, stunted growth, and harmful algae blooms.
NO2 <0.0001 ppm NitriteIt is a highly toxic, intermediate compound in the nitrogen cycle produced from broken-down ammonia
PO4 0.01 - 0.1 ppm PhosphateIt is essential for plant development but must be managed, as excess levels trigger nuisance algae blooms and inhibit coral calcification.
NH3 <0.1 ppm AmmoniaIt is the primary killer of aquarium fish, causing gill damage, stress, and death
Ca 380 - 450 ppm CalciumSupporting the growth, skeletal structure, and shell formation of corals, mollusks, crustaceans, and coralline algae
KH 8 - 12 dKH AlkalinityIt acts as a shield, neutralizing acids to prevent dangerous pH "crashes" that can harm fish, corals, and plants.
Mg 1200 - 1400 ppm MagnesiumIt enables coral growth by supporting skeletal formation, assists in metabolic processes, and ensures that calcium is available for corals, clams, and coralline algae.
SG 1.023 - 1.026 SG SalinityEssential for maintaining stable, natural water parameters, proper osmoregulation, and stress-free environments for marine fish and corals
ORP 250 - 400 mV Oxidation-Reduction PotentialA higher positive mV indicates clean, oxygen-rich water with high water quality, while low readings indicate high pollution.
About Filamented Dartfish
General information
The Filamented Dartfish (Ptereleotris hanae) is a small and colorful saltwater fish that can grow up to 3 inches in length. They have a slender, elongated body with vibrant shades of blue, green, and yellow. Filamented Dartfish are typically peaceful and active swimmers that do well in small groups in a well-maintained aquarium.
Diet & nutrition
In the wild, Filamented Dartfish feed on a diet of plankton and small crustaceans. In an aquarium setting, they will accept a variety of foods including frozen or live brine shrimp, mysis shrimp, and other small meaty foods. It is important to provide them with a varied diet to ensure they receive all the necessary nutrients.
Determining sex
There is no visible difference between male and female Filamented Dartfish.
Breeding & spawning
Filamented Dartfish are known to spawn in captivity, but breeding them can be difficult. They are egg scatterers and the eggs hatch within a few days. It is best to provide a separate breeding tank with plenty of hiding places for the eggs and young.
Diseases
Filamented Dartfish are generally hardy and disease-resistant if kept in a well-maintained aquarium. However, they can be susceptible to common saltwater fish diseases such as ich and velvet if water quality is poor or if they are stressed due to poor husbandry.
Origination
Filamented Dartfish are native to the Western Pacific Ocean, particularly in the waters around Japan and the Philippines.
Cautions
Filamented Dartfish are generally not aggressive towards other tank mates, but they may become territorial towards other dartfish or fish of similar shape and size. It is important to provide plenty of hiding places and swimming space to prevent any aggression.
Acclimation process
When introducing Filamented Dartfish to a new aquarium, it is important to slowly acclimate them to the new environment. The drip acclimation method is recommended, where water from the aquarium is gradually added to the transport bag over a period of several hours.
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