Description

Overview:
The Atabapo Altum Angelfish is the largest and most elegant of all freshwater angelfish species, revered for its tall, gracefully extended fins, compressed body, and striking vertical stripes. This rare Atabapo variant features deeper red hues in the head and gill plates, adding a fiery accent to its silver and bronze body. It’s a true showpiece for serious aquarists and biotope enthusiasts.
Origin:
Collected from the Atabapo River, a tributary of the upper Orinoco River in Venezuela, Pterophyllum altum thrives in soft, acidic blackwater conditions among submerged roots and leaf litter.
Feeding:
Altums are omnivorous, with a preference for protein-rich foods. Offer a varied diet of high-quality flakes or pellets, frozen bloodworms, brine shrimp, mysis, and occasional live food for conditioning.
Tank Mates:
Best kept with peaceful, calm species that thrive in similar water parameters—such as cardinal tetras, hatchetfish, rummy nose tetras, pencilfish, and Corydoras. Avoid fin-nipping or boisterous species that may stress the Altum.
Water Parameters:

Temperature: 82–86°F (28–30°C)

pH: 4.5–6.5

GH: 1–5 dGH (very soft water)

Minimum Tank Size: 75+ gallons, 24″+ height recommended

Requires pristine water, gentle flow, and regular maintenance

Aquascaping Tips:

Mimic their natural habitat with driftwood, tall plants, leaf litter, and subdued lighting

Blackwater setups with tinted water (from botanicals or peat) are ideal for long-term health and stress reduction

Special Notes:

Sensitive to water quality – ideal for advanced aquarists

Can be shy initially; becomes confident once acclimated

May form pairs and breed in soft, clean conditions

Known for their graceful swimming and calm presence

The Atabapo Altum Angelfish is not just a fish—it’s a statement. Ideal for aquarists seeking an authentic South American biotope, or a centerpiece species with unmatched elegance, personality, and rarity. With proper care, this living artwork will thrive and mesmerize for years.