Quick Stats
| Adult Size | 5–7 cm |
| Minimum Tank | 20 gal |
| Temperature | 20–24°C |
| pH Range | 6.5–7.5 |
| Hardness (GH) | 4–12 dGH |
| Difficulty | Medium |
| Temperament | Peaceful |
| Diet | Herbivore — algae, biofilm, algae wafers, blanched vegetables |
| Schooling | 2–3 rec. |
Tank Setup
The Hillstream Loach (Sewellia lineolata) requires a minimum tank size of 20 gal. For a species this size, a larger tank is always better — more water volume means more stable parameters and a healthier environment.
Water parameters should be maintained within the following ranges: temperature 20–24°C, pH 6.5–7.5, and hardness 4–12 dGH. These fish are sensitive to water quality — test regularly and maintain pristine conditions.
Provide appropriate hiding places, a suitable substrate, and open swimming space to match the natural behaviour of this species.
Tank Mates
Hillstream Loach are peaceful fish. They work well in community tanks with similarly-sized peaceful species.
Compatible tank mates include: White Cloud Mountain Minnow, Zebra Danio, Corydoras, Bristlenose Pleco, Cherry Shrimp. Avoid housing with aggressive or much larger fish.
Schooling requirements: 2–3 rec..
Diet & Feeding
Hillstream Loach are Herbivore. Their diet should reflect their natural feeding habits.
Herbivore — algae, biofilm, algae wafers, blanched vegetables
Feed small amounts 1–2 times daily. Only provide what the fish can consume within 2–3 minutes to prevent overfeeding and water quality issues.
Common Health Issues
Like all aquarium fish, Hillstream Loach can be susceptible to common diseases including ich (white spot disease), fin rot, and bacterial infections. This species can be sensitive — maintain excellent water quality to prevent health issues.
Prevention is always better than treatment. Maintain stable water parameters, avoid overfeeding, quarantine new fish before adding them to the main tank, and perform regular water changes. Test your water weekly and address any parameter spikes immediately.
If disease does occur, isolate affected fish in a quarantine tank and treat appropriately. Always research medication compatibility before use — some treatments are toxic to invertebrates and scaleless fish.
Breeding
Breeding Hillstream Loach requires specific conditions and may be challenging for beginners.
Provide appropriate breeding conditions — caves or hiding places for egg-laying species. Condition breeding pairs with high-quality foods before attempting to spawn them.
Research specific breeding requirements for this species before attempting it.
Frequently Asked Questions
What size tank does a Hillstream Loach need?
A Hillstream Loach needs a minimum tank size of 20 gal. However, larger is always better — more water volume means more stable water parameters and healthier fish.
Are Hillstream Loach easy to keep?
Hillstream Loach are rated as Medium difficulty. Some experience with aquarium water parameters is recommended before keeping this species.
What do Hillstream Loach eat?
Hillstream Loach are Herbivore. Feed a varied diet including algae, biofilm, algae wafers, blanched vegetables.
Can Hillstream Loach live with other fish?
Hillstream Loach are peaceful. Compatible tankmates include: White Cloud Mountain Minnow, Zebra Danio, Corydoras, Bristlenose Pleco, Cherry Shrimp. They work well in community tanks with similarly-sized peaceful fish.