🐠 Koi Angelfish Overview

🌿 Tank Requirements

Minimum tank size: 30 gallons for a pair; 55+ gallons for a small group
Water temperature: 25–29 °C (77–84 °F)
pH: 6.5–7.5
Hardness: 3–10 dGH
Filtration: Moderate; avoid strong currents — they prefer calm water
Lighting: Moderate — highlights the koi pattern
Aquascape:
- Tall plants (Amazon swords, Vallisneria, Java fern)
- Driftwood and rocks for vertical structure
- Open midwater swimming space
- Dark substrate enhances their koi-like colors

Omnivorous and easy to feed:

Tank: 20–30 gallons for a pair
Temperature: 28–30 °C (82–86 °F)
pH: ~6.8–7.0
Provide a flat surface for egg-laying — slate, broad leaves, or aquarium glass
Light current; calm, quiet environment

Koi Angelfish mimic the color patterns of koi carp, but each fish is unique.
Their triangular fins and graceful swimming make them one of the most eye-catching angelfish morphs.
Like all angelfish, they are cichlids, so they are intelligent, social, and sometimes territorial.