Water parameters
Overview
The red dwarf rasbora is a small species endemic to Inle Lake in Myanmar and its surroundings. As males mature they take on a color ranging from salmon red to deep red; females are silvery olive and plain. It grows to about 3 cm. Like the emerald dwarf rasbora from the same lake, and unlike tropical lowland fish, it needs cool, hard, alkaline water; it does not stay healthy for long in soft, acidic water.
Tank Setup
- At least 40 liters for a group of 8–12.
- 20–24°C, pH 7–8, moderately hard to hard water; make sure it does not exceed 26°C in summer heat.
- A dim setup with dense plants, moss and floating plants.
- Gentle flow and 20–25% water changes weekly.
Diet
Omnivorous. It accepts micro granules and fine flakes; newly hatched brine shrimp, cyclops and daphnia make the males' red more pronounced.
Behavior and Compatibility
Peaceful and somewhat timid. It swims in a loose group in the middle layer, close to the plants; males display to each other by flaring their fins.
Good companions: emerald dwarf rasboras, celestial pearl danios, Neocaridina shrimp, otocinclus, snails.
Avoid: active and large species, fish that need warm, soft water, any species with a mouth big enough to swallow it.
A short profile for this species
The Red Dwarf Rasbora 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
Flame Tetra
Blackfin Corydoras
Polystictus Corydoras
Emerald Cory
Emerald Dwarf Rasbora
Porthole Catfish
Keyhole Cichlid
Cryptocoryne Parva
European Bitterling
African Glass Catfish
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






