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Three-Lined Corydoras
Corydoras trilineatus
Most 'Julii Cory' sold in stores are actually this species. A lovely shoaling catfish with three dark lines along the flanks.
Care Parameters
Adult size
6 cm
Min tank
76 L
Temperature
22–26°C
pH
5.8–7.2
GH
1–12 dGH
Diet
Omnivore
Temperament
Peaceful
Water zone
Bottom
Difficulty
Beginner
Schooling
Group of 6 or more; true C. julii is rare in the trade.
Suitable Plants
5Dwarf Lettuce
A floating rosette plant resembling small lettuce heads. Provides shade, absorbs excess nutrients, and offers cover for fry. Roots provide habitat for microorganisms.
Rotala indica
Care profile for Rotala indica: 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.
Rotala sp. h'ra
A stunning stem plant that develops intense orange-red coloration under high light and CO2. Narrow leaves arranged in whorls create a striking background accent in aquascapes.
Water Wisteria
Care profile for Water Wisteria: medium light, low CO₂, beginner difficulty.
Compatible Invertebrates
4B
Babaulti Shrimp
A small, colorful freshwater shrimp available in green, brown, and striped morphs. Hardy and easy to breed, making them excellent additions to planted community tanks.
Taiwan Bee Shrimp
A high-grade Caridina morph with bold black and white banding. One of the most prized ornamental shrimp. Requires soft, acidic water (pH 6.0-6.8, GH 4-6) and pristine conditions.
Ghost Shrimp
A see-through, feather-light scavenger sold by the handful. Tough across 3-15 dGH and a wide temperature band. Beware mislabeled tankmates: true Ghost Shrimp is Palaemon paludosus, while the larger, more predatory Macrobrachium species are often sold under the same name.
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.
Suitable Equipment
5
Common Problems
5C
Cloudy Water
Milky or hazy water that never fully clears.
waterF
Fin Rot
Fins look frayed, ragged or are visibly shrinking with white or red edges.
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.
waterF
Fish Hiding or Chronic Stress
Fish hide constantly, refuse food and fade in color.
fish