Threadfin Rainbowfish
Iriatherina werneri
What you need to keep a Threadfin Rainbowfish
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pH
6–7.5
Temperature
24–29 °C
Max size
4 cm
Min tank
60 L
Where to buy
Compare prices from SA aquarium shops listing Threadfin Rainbowfish.
What Threadfin Rainbowfish costs in South Africa
3 price points from 3 shops over 90 days
R50
cheapest of 1 shop today
SA median R50 across 3 shops over the last 90 days.
5 shops
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Overview
What to know before you buy.
Extravagantly finned and tiny-mouthed, this is one of the most delicate-looking rainbowfish. Needs gentle flow, small foods and calm tankmates that will not outcompete it at feeding time.
Care guide
Keeping Threadfin Rainbowfish healthy in a South African setup.
Tank setup
A minimum 60L aquarium suits Threadfin Rainbowfish. Provide hiding spots and stable, well-filtered water; it suits a community setup.
Water parameters
Keep pH 6–7.5 and 24–29°C. Stable parameters matter more than chasing perfect numbers; acclimate new arrivals slowly.
Feeding
Micropredator — very small foods. Feed small amounts it clears in a couple of minutes, and vary the diet.
Behaviour
Peaceful; males display with extended fins. Watch it at feeding time and at lights-out to see its real temperament in your tank.
Tankmates
Choose tankmates of similar size and temperament with the same water needs. Avoid fin-nippers and anything large enough to eat it.
Breeding
Breeding success with Threadfin Rainbowfish depends on the line and water chemistry; ask your shop about proven pairs.
Settling this fish in?
Condition the tap water, seed the filter, test through the first weeks — most early losses trace back to one of those.
10% off your first order, no code, at checkout
Availability confirmed with the distributor before dispatch · free delivery over r750
Community photos
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Market intelligence
Price trends and buyer demand — data only FishHub tracks.
Price history — last 90 days
SA price range this month: R40–60 · Average: R50
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Demand by province
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