Water Sprite

Type: Stem/floating plant
Light: Low to high (very adaptable)
Growth rate: Fast
CO2: Not required
Difficulty: Beginner

Overview

Water sprite (Ceratopteris thalictroides) is one of the easiest and most versatile aquarium plants. It grows quickly, absorbs excess nitrates, and provides excellent cover for fry, shrimp, and shy fish. It can be planted in substrate or left floating at the surface.

Lighting & Placement

Thrives under almost any light level. Under high light it grows rapidly and will need frequent trimming. Floating water sprite shades the tank below, which can help reduce algae and make shy fish feel secure. Planted in substrate, it develops a root system and grows upright as a bushy stem plant.

Propagation

Water sprite produces small plantlets along the edges of its leaves. These detach on their own or can be gently pulled off once they have a few roots. Float or plant the new sprigs — they establish quickly. In good conditions a single plant can fill a tank within weeks.

Benefits

Absorbs nitrates and helps keep water clean
Provides hiding spots for fry and shrimp
Outcompetes algae by consuming excess nutrients
No CO2 or fertilizers needed (though they speed growth)

Tips

Trim regularly to prevent it from blocking all light below
Remove yellowing or melting leaves to keep the tank tidy
Works great in breeding tanks as egg and fry cover

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Last updated: June 8, 2026