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Bristlenose Pleco

By The Aquarium Calculators Editorial Team ·

Ancistrus spp.

Complete Bristlenose Pleco care guide covering omnivore diet requirements, peaceful temperament, minimum 25 Gallons tank setup, and compatible freshwater tankmates. Difficulty: Easy.

Bristlenose Pleco

Quick Answer

Bristlenose Pleco (Ancistrus spp.) is a captivating and highly sought-after freshwater species. It requires a minimum 25 Gallons aquarium with a pH of 6.5 - 7.5 and temperature range of 22-26°C. This omnivore occupies the bottom zone and makes an excellent addition to community setups.

Intro

Bristlenose Pleco (Ancistrus spp.) is a captivating and highly sought-after freshwater species. Known for their peaceful nature and distinct appearance, they occupy the bottom levels of the aquarium and bring dynamic energy to any setup.

Setup

Bristlenose Pleco requires a stable, well-filtered aquarium of at least 25 gallons. They thrive best with moderate water movement and a reliable heater to maintain temperatures around 22-26°C. Ensure pH levels remain consistent between 6.5 - 7.5 to prevent stress and support long-term health.

Feeding

As a omnivore, the Bristlenose Pleco is not a picky eater. They should be fed a high-quality base of flakes, sinking pellets, or wafers. Periodic supplementation with frozen or live foods, such as bloodworms or brine shrimp, will boost their health and colors.

Compatibility

Bristlenose Pleco has a peaceful temperament. They are compatible with other fish of similar sizes and temperaments. Avoid placing them with aggressive species or tankmates they are listed as incompatible with, such as: None.

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Tank Position
Bottom
Water Temp
22-26°C
Adult Size
See profile
Water pH
6.5 - 7.5

Species Characteristics

Adult Size
Lifespan
Growth Rate
moderate
Tank Compatibility
Community compatible
Indoor Aquarium
Yes

Water Parameters

Water Temperature
Humidity
Water pH

Tank Lighting

Tank Lighting
Standard lighting
Light Hours
N/A
Intensity
moderate

Feeding & Diet

Diet Type
Diet: Omnivore
Feeding Schedule
N/A
Live Food Options
N/A

Continue Learning

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Fish Compatibility Calculator fish compatibility

Health & Disease

Ich (White Spot Disease) common disease • all fish

Related Guides

Understanding pH in Aquariums water parameters • ph

Similar Species

African Red Eyed Tetra Care Guide: Schooling & Tank Size semanticSimilarity Apistogramma Care Guide: Temperament & Diet semanticSimilarity Banded Corydoras Care Guide: Substrate & Diet semanticSimilarity

Frequently Asked Questions

How many Bristlenose Plecos should be kept together?
Keep one per 20 gallons (75 liters), or a single male-female pair in a tank of at least 30 gallons (113 liters) with a footprint of 30x12 inches (75x30 cm). Bristlenose plecos (Ancistrus cirrhosus) are territorial; multiple males in under 30 gallons fight over caves, causing barbel damage. For breeding, maintain one male with 2-3 females. Provide at least 2 caves per male (ceramic tubes, bamboo). In community tanks, keep a single specimen. Avoid other bottom-dwelling catfish (clown plecos, corydoras in high numbers).
What are the exact water parameters for Bristlenose Plecos?
Target pH 6.5 - 7.5, General Hardness 5 - 15 dGH, Carbonate Hardness 4 - 12 dKH, Total Dissolved Solids 120 - 400 ppm, Electrical Conductivity 250 - 800 μS/cm, and temperature 73°F - 80°F (23°C - 27°C). They are hardy but require pristine water for barbel health. Maintain nitrates below 20 ppm with weekly 25% water changes. Driftwood is mandatory (1 piece per 10 gallons) for lignin digestion. Provide strong oxygenation with a powerhead or air stone. Use sand or smooth gravel to protect barbels. Avoid copper-based medications.
What is the nutritional and medication protocol for Bristlenose Plecos?
They are primarily herbivores (70% plant, 30% protein). Feed sinking wood-based wafers (Hikari), spirulina tabs, blanched vegetables (zucchini, cucumber, green beans, peas) daily. Offer occasional frozen bloodworms or brine shrimp for protein. They graze on driftwood and biofilm. Medication alert: Extremely sensitive to copper (0.1 mg/L lethal) and formalin. Use praziquantel safely. Avoid salt (tolerance <3 ppt). Quarantine with metronidazole at half-dose. They are scaleless; treat ich with malachite green at quarter dose (0.025 mg/L).
How to breed Bristlenose Plecos in a home aquarium?
Condition a male and female with spirulina wafers and blanched zucchini for 2 weeks. Perform 30% water change with cooler (70°F/21°C) water to simulate rain. Provide a ceramic cave (1.5 inches diameter). The male cleans the cave and traps the female inside. Female lays 50-200 orange eggs; male fertilizes and guards them. Eggs hatch in 5-10 days at 75°F (24°C). Fry are 0.25 inches (6 mm) and accept blanched zucchini, algae wafers, and crushed spirulina flakes immediately. Remove male after fry hatch. Grow-out requires driftwood and frequent feeding.

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