The Rainbow Loach (Botia kubotai, also called the Polka-Dot Loach) is a striking freshwater fish known for its unique chain-like markings and peaceful temperament compared to other loach species. Native to the rivers of Myanmar and Thailand, they thrive in well-oxygenated aquariums with soft substrate, hiding spots, and plenty of swimming space. Rainbow Loaches are social fish that should be kept in groups of at least 5–6 to reduce stress and aggression, as they establish a natural hierarchy. They prefer clean, slightly acidic to neutral water and benefit from strong filtration and regular water changes. Omnivorous by nature, they feed on sinking pellets, live and frozen foods such as bloodworms and brine shrimp, and vegetable matter. With proper care, they become lively, long-lived additions to community aquariums.
| Parameter | Requirement |
|---|---|
| Scientific Name | Botia kubotai (Rainbow/Polka-Dot Loach) |
| Tank Size | Minimum 40 gallons |
| Temperature | 24–28°C (75–82°F) |
| pH Range | 6.0–7.5 |
| Water Hardness | Soft to moderate (5–12 dGH) |
| Substrate | Soft sand or fine gravel with hiding spots (caves, driftwood, rocks) |
| Diet | Omnivorous – sinking pellets, live/frozen foods (bloodworms, brine shrimp), vegetables |
| Temperament | Peaceful, semi-active, good for community tanks |
| Social Behavior | Schooling; best kept in groups of 5–6+ |
| Breeding | Rare in aquariums; not commonly bred in captivity |
| Lifespan | 8–12 years with good care |