Water parameters
Overview
The glass tetra is a larger, stockier relative that closely resembles the red-eye tetra; as an adult it can reach 10 cm. Its large, dark-edged scales form a distinct net pattern on the body. The upper part of the eye is red; at the base of the tail there is a black spot with a pale band in front of it. It is hardy and has a good appetite, but its size and activity mean it needs a spacious tank.
Tank Setup
- At least 150 liters for a group of 6–8; 100 cm length.
- 23–27°C, pH 6–7.5, soft to moderately hard water.
- Sturdy plants and plenty of open swimming space; some individuals may pick at soft plants.
- Strong filtration and weekly water changes.
Diet
Omnivorous with a good appetite. Flakes, granules, frozen bloodworms, brine shrimp, mysis shrimp and plant-based foods are suitable.
Behavior and Compatibility
An active schooling fish. In a large group it is usually trouble-free, but it may pick at the fins of slow, long-finned species. It may eat shrimp and fish fry.
Good companions: medium to large tetras, barbs, plecos, large corydoras, peaceful medium-sized cichlids.
Avoid: long-finned species, nano fish, dwarf shrimp.
A short profile for this species
The Glass Tetra page has the basics, but the sections below have not been written yet. If you keep this species, write a section from your own experience; it will be published under your name after editor approval.
Tank mates
This list is calculated automatically from the species profile and grows as new species are added to the catalog. Try it in the planner for a definite answer.
Usually compatible
Emerald Betta
Keyhole Cichlid
Firemouth Cichlid
Cupid Cichlid
Buffalohead Cichlid
Geophagus altifrons
Geophagus surinamensis
Rainbow Cichlid
Gymnogeophagus balzanii
Pearl Cichlid
Should not be kept together
Hobbyist notes
Things you won't find in books, learned by trial and error. The most helpful ones are on top.
Change history and contributors
- Page created · October 16, 2026