Altum Angelfish

Pterophyllum altum

Altum Angelfish (Pterophyllum altum) — Varies care, Peaceful, under Other. Minimum tank in the app: 45 US gal min; aim for 79–90°F and pH 6.5–7.5. The Altum Angelfish is ideal for experienced aquarists seeking a striking centerpiece fish with a unique profile.

Altum Angelfish (Pterophyllum altum) in a planted freshwater aquarium
Care levelVaries
TemperamentPeaceful
Min tank size45 US gal min
pH range6.5–7.5
Temperature79–90°F
Max size7.1 in (18.0 cm)
Captive lifespan8–12 years
SchoolingNo

Captive lifespan reflects typical experience in a home aquarium, not maximum recorded age; genetics, sourcing, and care vary.

Natural distribution

South America

  • South America

Regional colours match the stocking calculator’s origin map.

Altum Angelfish Tank Setup

Create a spacious layout with ample vertical height, as Altums are mid-water swimmers. Incorporate driftwood and tall plants to provide both cover and swimming lanes. Maintain gentle water flow to mimic their natural habitats, and opt for subdued lighting to reduce stress and encourage natural behaviour.

What Do Altum Angelfishs Eat?

Altum Angelfish are omnivorous and prefer varied diets, but they can be slow feeders. This requires monitoring to ensure they receive adequate nutrition without competition from faster eaters.

Altum Angelfish Tank Mates

Best paired with similarly sized, non-aggressive species like larger tetras or peaceful bottom dwellers that won't compete for mid-water space. Avoid small, fast-moving fish that may provoke aggression, and ensure that tank mates are not overly territorial, as this can stress the Altum. Intraspecies aggression can arise if multiple Altums are kept in a smaller tank, so ample room is essential.

Are Altum Angelfishs Good for Beginners?

Care demand varies with setup and individual fish; use the numbers above as your baseline. Aquarists often underestimate the space requirements and environmental needs of Altum Angelfish, leading to stress and aggression. neglecting to provide adequate cover and swimming space can result in territorial disputes and health decline.

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