Species description

Care, breeding and tankmates

Fish profile

Temperament

Semi-aggressive

They possess a calm, timid, and entirely peaceful temperament. They thrive in quiet environments and can easily be outcompeted by boisterous fish. Given a serene setting, they will comfortably school and explore the tank.

Diet

Carnivore

Their diet in the wild consists of tiny worms, crustaceans, and zooplankton. In captivity, they require appropriately sized foods like micro-pellets and crushed flakes. Supplementing with live baby brine shrimp will greatly improve their overall health.

Sex ratio

Group

Keeping a balanced mixed group is ideal for social harmony and display. Males may occasionally display towards one another, but injuries are extremely rare. A ratio skewed slightly towards females can further reduce any male bickering.

Feeding frequency

Twice daily

Offer small amounts of food twice daily to keep them well-nourished. Their tiny mouths dictate that food particles must be very small. Ensure that food reaches them before faster-swimming fish can intercept it.

Bioload

The Two-stripe Pencilfish has a very low bioload that is easily managed. They add minimal waste to the aquarium ecosystem due to their size. A properly cycled sponge or gentle canister filter will keep water pristine.

Flow

Stagnant

They originate from slow-moving streams and prefer a gentle water current. Excessive flow can blow them around the tank and cause undue stress. A spray bar attached to the filter output helps distribute flow evenly.

Reproduction

Oviparous

Breeding them requires soft, acidic water and a heavily planted dedicated tank. They will scatter their adhesive eggs among fine-leaved mosses or spawning mops. Prompt removal of the adults after spawning is necessary to save the eggs.

Compatibility & tankmates

They are an exceptionally peaceful species suited for nano or community tanks. Great tank mates include small rasboras, dwarf cichlids, and peaceful bottom dwellers. They should never be kept with fin-nippers or large, predatory fish.

Tank level

Top/Middle

They generally inhabit the upper-middle to top levels of the water column. They enjoy hovering near the surface, often seeking shelter under floating leaves. Providing tall background plants makes them feel secure in the upper regions.