Description
The Altum Angelfish is known from the upper Rio Negro and tributaries of the upper Rio Orinoco, including the Rio Atabapo and Rio Inarida. Here it inhabits the slower reaches of rivers, living amongst submerged roots and marginal vegetation. The Altum Angelfish is a majestic species which requires a taller than average aquarium, due to its potential adult height and long trailing finnage. Soft, acidic water with negligible hardness is requisite. Adults should never be housed with small fish (e.g. Neon Tetras) as they will quickly become a snack. The substrate should be soft and smooth, so as to protect the delicate finnage when the fish are swimming in the lower reaches of the tank, and a good cover of aquatic plants along with some tall pieces of driftwood should be provided in order for the fish to feel safe. Filtration should be efficient, but water movement fairly gentle, and small frequent water changes will help to keep pollutants to a minimum (these fish are very sensitive to elevated nitrates). In larger aquaria, Altum Angelfish can be maintained in good size groups; this will not only make them feel much more secure, but it will result in a much more effective, natural looking shoal. Tankmates should be of similar size, and be of a peaceful disposition. Good companions could include some of the larger, deeper-bodied characins, other peaceable South American cichlids, sizeable Corydoras catfish etc. Be aware that if a pair of Altum Angelfish form, they will become very territorial when breeding, so observe carefully; however, this should not cause issues in voluminous aquaria. Not recommended for beginners.
