Can Clown Loach Live With Corydoras Catfish? Compatibility Guide

Compatibility Overview

Clown Loach and Corydoras Catfish can potentially coexist, but the combination requires careful attention. Some combination of water parameter differences, size mismatch, or temperament issues make this pair challenging. A larger tank (minimum 100 gallons), dense planting, and close monitoring are essential.

Factor	Clown Loach	Corydoras Catfish	Verdict
Temperature	77–86°F	70–79°F	⚠️ 77–79°F (narrow)
pH Range	6.0–7.5	6.0–8.0	✅ 6.0–7.5
Temperament	peaceful	peaceful	✅ Compatible
Adult Size	12 in	2.5 in	❌ 5× difference
Min. Group	5+	6+	See below
Min. Tank Size	100 gallons (for both species)		—

✅ Compatibility Positives

✅pH ranges are compatible: workable range is 6.0–7.5.

✅Both species are peaceful — low aggression risk.

✅Both species are schooling fish — keep Clown Loach in groups of 5+ and Corydoras Catfish in groups of 6+.

⚠️ Caution Points

⚠️Narrow temperature overlap (77–79°F) — keeping the tank at exactly 78–78°F is needed for both species.

⚠️Significant size difference (12 in vs 2.5 in) — the larger species may out-compete for food or intimidate the smaller.

⚠️Both occupy the bottom; monitor for competition but usually peaceful.

Species Profiles

Clown Loach — Chromobotia macracanthus

Striking striped loach that grows very large. Peaceful with fish but will eat shrimp, snails and tiny fish.

→ Full Clown Loach care guide

Corydoras Catfish — Corydoras spp.

Armoured bottom-dwelling catfish that are peaceful with all non-aggressive species. Need fine sand substrate to protect delicate barbels.

→ Full Corydoras Catfish care guide

Frequently Asked Questions

Can Clown Loach live with Corydoras Catfish?

With significant caution and a larger tank. Clown Loach and Corydoras Catfish can potentially coexist, but the combination requires careful attention. Some combination of water parameter differences, size mismatch, or temperament issues make this pair challenging. A larger tank (minimum 100 gallons), dense planting, and close monitoring are essential.

What tank size do I need for Clown Loach and Corydoras Catfish together?

A minimum of 100 gallons is recommended for keeping Clown Loach and Corydoras Catfish together. A larger tank improves water stability and reduces territorial conflict.

What temperature suits both Clown Loach and Corydoras Catfish?

77–79°F (narrow)

Is a Clown Loach aggressive toward a Corydoras Catfish?

Clown Loach is peaceful and Corydoras Catfish is peaceful. Narrow temperature overlap (77–79°F) — keeping the tank at exactly 78–78°F is needed for both species.

Related Compatibility Guides

📖 Clown Loach Encyclopedia 📖 Corydoras Catfish Encyclopedia 🔄 All Compatibility Guides 🛠️ Compatibility Checker Tool 📋 Fish Care Guides 💧 Water Parameter Checker