Bristlenose Pleco — Fish Profile
Ancistrus cirrhosus
Quick Specs
| Adult Size: | 5.0" |
| Temperament: | peaceful |
| Care Level: | beginner |
| Min Tank Size: | 20 gallons |
| Temperature: | 72-82°F |
| pH Range: | 6.5-7.5 |
| Diet: | herbivore |
| Origin: | South America (Amazon Basin) |
| Lifespan: | 5-10 years |
Overview
Bristlenose Plecos are excellent algae eaters that stay much smaller than common plecos, making them ideal for medium-sized tanks. Males develop distinctive bristles on their snout. They are peaceful bottom-dwellers that prefer driftwood and hiding spots.
Care Guide for Bristlenose Pleco
Tank Setup
Bristlenose Pleco requires a minimum tank size of 20 gallons. Maintain water temperature between 72°F and 82°F, with a pH range of 6.5 to 7.5. A properly sized tank with adequate filtration and regular water changes is essential for long-term health. When housing Bristlenose Pleco with other species, always choose a tank size that accommodates the most demanding fish in the community.
Feeding
Bristlenose Pleco is a herbivore feeder. Provide a varied diet appropriate for herbivore species to ensure optimal health and coloration. Feed small portions 2–3 times daily, and remove uneaten food after a few minutes to maintain water quality.
Temperament & Compatibility
This species is classified as peaceful. Bristlenose Pleco reaches an adult size of 5.0 inches and has a care level of beginner. Always research compatibility before adding new fish to an established aquarium. Individual temperament can vary, so monitor new introductions closely for the first 48 hours.
Origin & Lifespan
Bristlenose Pleco originates from South America (Amazon Basin) and has an expected lifespan of 5-10 years when kept in proper water conditions with appropriate tank mates and diet.
Compatible Tank Mates
🟢 Good Tank Mates
🟡 Caution Tank Mates
Compatibility Results for Bristlenose Pleco
All 69 compatibility checks involving Bristlenose Pleco:
Recommended for Bristlenose Pleco
Omega One Veggie Rounds — $9.49Sinking algae rounds for plecos and herbivores
Expert Care Tips for Bristlenose Pleco
- Mid-size tank: Bristlenose Pleco needs 20+ gallons. Choose a tank at least 2× as long as the fish's adult size (5.0") for adequate swimming room.
- Warm-water species: Bristlenose Pleco prefers 72–82°F. Use a reliable submersible heater with a thermostat — avoid temperature swings above 2°F per day.
- Narrow pH tolerance: Bristlenose Pleco only tolerates pH 6.5–7.5. Test your tap water before buying — adjusting pH is harder than choosing the right fish for your water.
- Peaceful community fish: Bristlenose Pleco works well in community tanks. Still, avoid housing with fish large enough to eat them — a 5.0" fish is vulnerable to anything with a mouth bigger than 2×.
- Acclimation: Always drip-acclimate Bristlenose Pleco over 30–45 minutes. Match temperature and pH gradually to prevent osmotic shock.