Sewellia breviventralis (4–6cm) is a rare hillstream loach with stunning patterns, perfect for river-style aquariums. Hardy, active, and algae-grazing species.

Add an exotic and functional fish to your aquarium with the Sewellia breviventralis, a fascinating hillstream loach prized for its striking reticulated patterns and unique body shape. This species thrives in river-style aquariums with high oxygen levels and strong water flow, making it a favorite among aquascaping enthusiasts and advanced hobbyists.

At 4–6 cm when sold, this bottom-dwelling fish provides both aesthetic beauty and practical benefits by grazing on algae and biofilm. Perfect for those looking to replicate a natural stream habitat in their aquarium.

✅ Key Features

• Size: 4–6 cm (juvenile), up to 7 cm adult

• Temperament: Peaceful and social

• Care Level: Moderate (requires specific tank conditions)

• Lifespan: 5–8 years with proper care

• Role: Excellent algae grazer and active bottom dweller

Care Guide for Sewellia breviventralis

✅ Tank Requirements

• Minimum Tank Size: 75 liters (20 gallons) for a small group

• Aquascape: River-style setup with smooth stones, driftwood, and plants

• Flow: Strong water current (use powerheads or canister filters)

• Lighting: Moderate to bright to encourage algae growth for grazing

• Cover: Tight-fitting lid, as they may climb on glass

✅ Water Parameters

• Temperature: 20°C – 26°C (68°F – 79°F)

• pH Level: 6.5 – 7.5

• Water Hardness: Soft to moderately hard

• Filtration: Excellent filtration and high oxygen levels are essential

• Water Changes: 30–40% weekly to maintain pristine water quality

Hillstream loaches require clean, well-oxygenated water similar to their natural fast-flowing stream habitat.

✅ Feeding Habits

Sewellia breviventralis is an omnivore that grazes primarily on biofilm and algae, but also requires supplemental feeding.

• Recommended Diet:

  • Algae wafers

  • Sinking micro-pellets

  • Blanched vegetables (zucchini, spinach)

  • Frozen or live foods (bloodworms, daphnia) for protein

Feed small amounts 1–2 times daily. Avoid overfeeding to maintain water quality.

✅ Tank Mates

This species is peaceful and best kept in groups for natural behavior.

Ideal Tank Mates:

• Small rasboras and danios

• White Cloud Mountain minnows

• Other hillstream loaches

• Corydoras catfish

• Shrimp and snails (with caution)

Avoid aggressive, large, or territorial fish.

✅ Behavior & Breeding

• Behavior: Active bottom dweller, clings to rocks and glass in strong currents

• Breeding: Rare in home aquariums; requires high oxygen levels and flowing water for successful spawning

Why Choose Sewellia breviventralis?

• Striking patterns and unique body shape for an eye-catching display

• Perfect for biotope and aquascaped tanks with strong water flow

• Helps control algae growth naturally

• Peaceful and community-friendly for river-style setups

✅ Great for experienced aquarists and advanced aquascapers
✅ A functional and beautiful addition to fast-flowing freshwater aquariums