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Carinotetraodon travancoricus
The world's smallest pufferfish, reaching only 2.5 cm. A fascinating, intelligent nano fish that hunts snails. Requires species-only or carefully selected tank mates.
Solitary or groups of 6+ in large tanks.
Pygmy Chain Sword
Care profile for Pygmy Chain Sword: medium light, none CO₂, beginner difficulty.
Staurogyne repens
Care profile for Staurogyne repens: medium light, low CO₂, beginner difficulty.
Lilaeopsis
A miniature grass-like plant that forms a dense, low carpet. One of the smallest foreground plants, ideal for nano aquascapes. Tolerates low light but grows denser under high light.
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.
Dwarf Hairgrass
Care profile for Dwarf Hairgrass: medium-high light, medium CO₂, intermediate difficulty.
Thai 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.
Cloudy Water
Milky or hazy water that never fully clears.
waterFilter Crash
The biological filter fails after aggressive cleaning, media replacement or a long outage.
equipmentLow Filter Flow
The filter output weakens, reducing circulation and filtration.
equipmentHigh Ammonia Poisoning
Elevated ammonia levels cause burns, redness and rapid breathing.
waterTemperature Shock
Sudden temperature swings after water changes, heater failure or power cuts stress fish.
fish