Salsbury's osteochilus

Where they come from

Salsbury's osteochilus is a river cyprinid from mainland Southeast Asia into southern China. Think clear to tea-stained streams and medium rivers with steady current, sandy or pebbly bottoms, and lots of rocks and wood to graze. They spend a ton of time picking at biofilm and algae on hard surfaces.

Setting up their tank

Give them room and flow. A group does best, so plan for space. I would not put a group of 5-6 in anything under a 75 gallon, and bigger is nicer if you want lively swimming and less squabbling.

• Substrate: sand or smooth small gravel. They root around, so avoid sharp edges.
• Hardscape: rounded river stones and driftwood to collect algae and break sightlines. Leave open cruising lanes.
• Plants: tough stuff like Anubias, Java fern, and floating plants. They may rasp softer leaves if hungry.
• Filtration and flow: strong filtration with added powerhead or spray bar. They like oxygen-rich water.
• Cover: tight lid. They can and will jump during spooks or courtship.
• Lighting: moderate. Let some algae grow on a few rocks. Rotate in pre-grown algae stones if you like.

Water parameters that have worked for me: 22-26 C, pH 6.2-7.5, GH 3-12. They handle a range if it is stable and clean. Do weekly water changes, 30-50%, and keep good surface agitation.

What to feed them

Think herbivore with a side of protein. They graze all day and do best on a veg-heavy routine.

• Staples: quality sinking veg pellets or wafers, spirulina-based foods, softened Repashy gel foods with greens.
• Fresh stuff: blanched spinach, zucchini, cucumber rounds, shelled peas, and seaweed sheets clipped to a rock.
• Protein treats (1-2x per week): frozen or live daphnia, brine shrimp, small earthworm bits. Easy on bloodworms to avoid bloat.
• Feeding pattern: smaller portions 2x per day. Leave a veg item in the tank for a few hours for grazing, then remove leftovers.

How they behave and who they get along with

They are active, social grazers that like to be in a group. Kept alone, they can get skittish or pushy. In a group of 5+ they sort themselves out and spend more time cruising and less time bickering.

• Good tankmates: medium barbs, larger rasboras, robust danios, rainbowfish, peaceful loaches (Botia/Modesta types if the tank is big), medium gouramis.
• Use caution with: other algae-grazers like Garra or SAE to avoid food turf wars in smaller tanks.
• Avoid: tiny nano fish, long-finned slow fish, shrimp colonies, and bruisers like big cichlids.

Breeding tips

I have not seen a confirmed home breeding of O. salsburyi, and mine never spawned. They are likely seasonal egg scatterers with group courtship during high-flow, rainier periods. If you want to try, set expectations low and treat it like a barb spawning project on a larger scale.

• Condition a group with heavy vegetable foods and small live foods.
• Use a long, roomy tank with strong current and high oxygen.
• Cool a degree or two with a big water change, then ramp up flow to simulate runoff.
• Provide marbles or mesh over the bottom so eggs can drop out of reach.
• Pull adults right after a spawn chase. Raise eggs and fry separately on infusoria then baby brine shrimp.

Common problems to watch for

• Jumping and nose scrapes: spooks are real. Keep a snug lid and break sightlines with wood and rocks.
• Plant nibbling: usually a sign they want more greens. Add veg foods and algae surfaces.
• Bloat from protein-heavy diets: keep meaty foods as treats, not staples.
• Low oxygen stress: they like current. If they hang near the filter outflow, add more aeration.
• Ich and flukes after import: quarantine new fish 3-4 weeks and deworm if they stay skinny despite eating.
• Bullying in small groups: keep 5+ and give them space, or the dominant fish will run the show too hard.