Black Widow Tetra 2cm

Black Widow Tetra 2cm Gymnocorymbus ternetzi

max size 2.4″ (6cm)

A small group of these can be kept in a standard 24″ x 15″ x 12″ (60cm x 37.5cm x 30cm) – 70 litre tank.

Fairly unfussy with regard to decor. It’s an active species and prefers plenty of open swimming space, along with some quieter areas. It will show its best colours when there are some dense areas of planting, with some floating vegetation added to dim the light entering the tank. In truth it will thrive in most environments, though.

water conditions

Temperature: 68-78°F (20-26°C)

pH: 6.0-7.0

Hardness: 5-20°H

A most unfussy, omnivorous species. Flakes and granules, along with regular feedings of small live and frozen foods such as Daphnia and bloodworm are recommended.

One of the better tetras for the ‘general’ community tank. The black widow is both peaceful and lively, and its subdued patterning makes a good contrast to more colourful species. It can be kept with most livebearers, danios, rasboras, other tetras and peaceful bottom dwellers such as Corydoras or smaller Loricariids. It also makes a suitable companion for more robust dwarf cichlids such as kribensis, and due to its somewhat rounded shape is unlikely to end up on the menu if combined with larger species such as angel fish. Although it has a reputation as a bit of a fin nipper, this behaviour can usually be rectified by keeping it in a small shoal of at least 6-8 specimens. When maintained in these kind of numbers any squabbling is generally contained within the group.