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Threadfin Rainbowfish
Iriatherina werneri
An ethereal, delicate rainbowfish with males displaying extraordinarily long, flowing dorsal and anal fin rays. Peaceful and graceful, best in species tanks or with similar gentle fish.
Care Parameters
Adult size
5 cm
Min tank
40 L
Temperature
24–28°C
pH
5.5–7.5
GH
2–8 dGH
Diet
Omnivore
Temperament
Peaceful
Water zone
Middle
Difficulty
Intermediate
Schooling
Schools of 6 or more.
Suitable Plants
5Salvinia
A small floating fern with distinctive cup-shaped leaves. Fast-growing and excellent for nutrient吸收 in shrimp tanks. Does not reproduce as aggressively as duckweed.
Flame Moss
A unique aquarium moss with upward-growing fronds that resemble flames. Creates a distinctive vertical texture different from traditional trailing mosses.
Cryptocoryne balansae
Care profile for Cryptocoryne balansae: medium light, low CO₂, intermediate difficulty.
Rotala indica
Care profile for Rotala indica: medium-high light, medium CO₂, intermediate difficulty.
Weeping Moss
A unique aquarium moss with fronds that droop downward, creating a distinctive weeping effect. Perfect for attaching to driftwood or rock overhangs for dramatic visual impact.
Compatible Invertebrates
4Vampire Shrimp
A large, impressive freshwater shrimp with fan-like appendages used to filter feed from the current. Can grow up to 15 cm and requires strong water flow and clean, well-oxygenated water.
Malaysian Trumpet Snail
A conically shelled burrower that aerates the substrate and patrols it for leftover food at night. Females reproduce by parthenogenesis, so a single snail can seed a colony - they are a genuine muck-prevention asset, but heavy feeding will let them multiply fast.
Cherry Shrimp
The most popular freshwater shrimp — bright red coloration, extremely hardy, and prolific breeder. The gateway species for shrimp keeping. Tolerates a wide range of conditions.
Nerite Snail
The best algae-eating snail for aquariums. Cannot reproduce in freshwater, so populations stay stable. Comes in zebra, tiger, and olive patterns. Will lay white eggs on glass.
Suitable Equipment
5
Common Problems
5F
Fin Rot
Fins look frayed, ragged or are visibly shrinking with white or red edges.
fishH
High Ammonia Poisoning
Elevated ammonia levels cause burns, redness and rapid breathing.
waterT
Temperature Shock
Sudden temperature swings after water changes, heater failure or power cuts stress fish.
fishW
White Spot Disease (Ich)
Tiny white salt-like grains on the body and fins of fish.
fishC
Cyanobacteria (Blue-Green Slime)
Slimy blue-green or dark purple patches with a foul odor.
water