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Common Pleco

By The Aquarium Calculators Editorial Team ·

Hypostomus plecostomus

Complete Common Pleco care guide covering herbivore diet requirements, peaceful temperament, minimum 75 Gallons tank setup, and compatible freshwater tankmates. Difficulty: Advanced.

Common Pleco

Quick Answer

Common Pleco (Hypostomus plecostomus) is a captivating and highly sought-after freshwater species. It requires a minimum 75 Gallons aquarium with a pH of 6.0 - 7.2 and temperature range of 22-26°C. This herbivore occupies the bottom zone and makes an excellent addition to community setups.

Intro

Common Pleco (Hypostomus plecostomus) 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

Common Pleco requires a stable, well-filtered aquarium of at least 75 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 6.0 - 7.2 to prevent stress and support long-term health.

Feeding

As a herbivore, the Common 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

Common 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
6.0 - 7.2

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: Herbivore
Feeding Schedule
N/A
Live Food Options
N/A

Continue Learning

Recommended Tools

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 Butterflyfish Care Guide: Tank Size & Diet semanticSimilarity African Cichlid Care Guide: Tank Size & Tank Mates semanticSimilarity Bala Shark Care Guide: Tank Size & Tank Mates semanticSimilarity

Frequently Asked Questions

How many Common Plecos can be kept together?
Keep strictly one per tank, even in systems over 200 gallons (757 liters). Common plecos (Hypostomus plecostomus) grow up to 24 inches (60 cm) and become highly territorial with age, fighting other plecos over caves and driftwood. Two adults in any sized tank will inflict severe wounds, including torn fins and eye damage. A single adult requires a minimum of 150 gallons (568 liters) with a footprint of 72x24 inches (180x60 cm). Provide at least 2 large caves and massive driftwood pieces. Avoid other bottom-dwelling catfish and large cichlids that may compete for territory.
What are the exact water parameters for Common Plecos?
Target pH 6.5 - 7.5, General Hardness 5 - 15 dGH, Carbonate Hardness 4 - 12 dKH, Total Dissolved Solids 150 - 400 ppm, Electrical Conductivity 300 - 800 μS/cm, and temperature 72°F - 82°F (22°C - 28°C). They produce massive waste; maintain nitrates below 30 ppm with weekly 40% water changes. Use a canister filter rated for 4x tank volume. Driftwood is mandatory (1-2 large pieces per fish) for digestion. Provide high oxygenation with multiple air stones. Avoid sharp gravel; use sand or large river rocks. Copper-based medications are lethal.
What is the nutritional and medication protocol for Common Plecos?
Juveniles are herbivorous (80% algae), but adults require 60% vegetable matter and 40% protein. Feed large wood-based wafers (Hikari), spirulina disks, blanched zucchini, cucumber, and sweet potato daily. Supplement with sinking carnivore pellets, frozen bloodworms, and chopped earthworms twice weekly. They graze on driftwood. Medication alert: Extremely sensitive to copper (0.05 mg/L lethal) and formalin. Use praziquantel safely. Avoid salt (tolerance <3 ppt). Quarantine with metronidazole at half-dose. Treat ich with malachite green at quarter dose (0.025 mg/L).
How to breed Common Plecos in a home aquarium?
Breeding is rare but possible in large tanks (200+ gallons). Condition a bonded pair with high-protein foods (bloodworms, shrimp) for 4 weeks. Simulate rainy season: Perform 50% water change with cool (68°F/20°C) RO water over 4 hours, increase flow, add driftwood. Provide a large cave (12x8 inches/30x20 cm). The male cleans the cave; female lays 100-300 large orange eggs inside. Male guards and fans eggs for 7-10 days at 78°F (25.5°C). Fry hatch and absorb yolk sac in 3-5 days; feed blanched zucchini and algae wafers. Remove male after fry leave cave.

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