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Golden Wonder Killifish
Aplocheilus lineatus
A surface-hunting killifish with golden flanks and red fins. Not annual, quite hardy, but will eat any fish small enough to fit its mouth.
Care Parameters
Adult size
10 cm
Min tank
75 L
Temperature
22–28°C
pH
6–7.5
GH
3–20 dGH
Diet
Carnivore
Temperament
Semi-aggressive
Water zone
Top
Difficulty
Intermediate
Schooling
Singly, in pairs, or a small group in a roomy tank.
Suitable Plants
5Myriophyllum
A graceful stem plant with feathery, comb-like leaves that create a soft, flowing background effect. Also known as Parrot's Feather, it adds delicate texture to aquascapes.
Red Rotala
Red stem plant. Turns red under high light with CO₂.
Ludwigia repens
Care profile for Ludwigia repens: medium light, low-medium CO₂, intermediate difficulty.
Blyxa japonica
Care profile for Blyxa japonica: medium-high light, medium CO₂, intermediate difficulty.
Marimo Moss Ball
A rare, spherical green algae ball that grows extremely slowly. Requires almost no maintenance — just occasional squeezing and turning. A fascinating living decoration.
Compatible Invertebrates
3Thai Micro Crab
A pea-sized, fully aquatic crab - no land zone needed - that perches on driftwood and picks microparticles from the water. Fragile and easily overlooked; keep a group of 3 or more in a mature nano tank, and never expose it to copper or sharp parameter swings.
Blue Crayfish
A selectively bred color morph of the red swamp crayfish with brilliant blue coloration. Hardy and active, but will eat plants and harass tank mates.
Vampire Crab
A small, semi-terrestrial crab with striking purple coloration and bright yellow eyes. Requires a paludarium setup with both land and water areas.
Suitable Equipment
5
Common Problems
5H
High Ammonia Poisoning
Elevated ammonia levels cause burns, redness and rapid breathing.
waterW
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.
waterL
Low Filter Flow
The filter output weakens, reducing circulation and filtration.
equipmentC
Cloudy Water
Milky or hazy water that never fully clears.
water