Algae Blenny

Salarias fasciatus

Saltwater Fish Species Group: Blenny Family: Blenniidae

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Water parameters

Temp 76-80 F Temperature

Maintaining a stable and appropriate temperature is critical for the survival of aquatic life.

pH 7.8 - 8.4 potential of Hydrogen

Measuring the acidity or alkalinity of water on a 0–14 scale, where 7 is neutral, 7 is alkaline.

NO3 1-20 ppm Nitrate

While 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 Nitrite

It is a highly toxic, intermediate compound in the nitrogen cycle produced from broken-down ammonia

PO4 0.01 - 0.1 ppm Phosphate

It is essential for plant development but must be managed, as excess levels trigger nuisance algae blooms and inhibit coral calcification.

NH3 <0.1 ppm Ammonia

It is the primary killer of aquarium fish, causing gill damage, stress, and death

Ca 380 - 450 ppm Calcium

Supporting the growth, skeletal structure, and shell formation of corals, mollusks, crustaceans, and coralline algae

KH 8 - 12 dKH Alkalinity

It acts as a shield, neutralizing acids to prevent dangerous pH "crashes" that can harm fish, corals, and plants.

Mg 1200 - 1400 ppm Magnesium

It 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 Salinity

Essential for maintaining stable, natural water parameters, proper osmoregulation, and stress-free environments for marine fish and corals

ORP 250 - 400 mV Oxidation-Reduction Potential

A higher positive mV indicates clean, oxygen-rich water with high water quality, while low readings indicate high pollution.

About Algae Blenny

General information

The Algae Blenny is a popular saltwater aquarium fish that is native to the western Pacific Ocean. It has a mottled brown and tan body with a distinctive dark stripe running down the center of its body. They are generally peaceful and active, and can grow up to 5 inches (12 cm) in length. These blennies are primarily herbivores and can help control algae growth in the aquarium. They are also known to be jumpers, so a tight-fitting lid is recommended.

Diet & nutrition

As herbivores, Algae Blennies mainly feed on various types of algae, including film, hair, and macroalgae. They can also accept some prepared foods such as algae sheets, pellets, and flakes. Providing a varied diet can help keep them healthy and happy in the aquarium.

Determining sex

There is no visible difference between male and female Algae Blennies.

Breeding & spawning

Breeding Algae Blennies in captivity is difficult and rarely accomplished. They are not known to breed in the wild.

Diseases

Algae Blennies are generally hardy and disease-resistant. However, they can be susceptible to common saltwater fish diseases such as marine ich and bacterial infections. Maintaining good water quality and avoiding overcrowding can help prevent these diseases.

Origination

The Algae Blenny is native to the western Pacific Ocean, specifically the waters surrounding Indonesia, the Philippines, and the Great Barrier Reef in Australia.

Cautions

Algae Blennies are generally peaceful, but they may become territorial towards other blennies or fish that have a similar body shape. They are also known to be jumpers, so a tight-fitting lid is recommended.

Acclimation process

When introducing Algae Blennies to a new aquarium, it is important to acclimate them slowly to avoid shock and stress. This can be done by floating the bag in the aquarium for 15-20 minutes to allow the temperature to equalize, and then gradually adding small amounts of water from the aquarium to the bag over the course of an hour.

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