Amazon Frogbit

(Limnobium laevigatum), for shade or part shade*. also known as South American Spongeplant, is a hardy, fast-growing, floating pond plant, native to central and South America. It is highly popular in the aquarium and pond hobby for its ability to improve water quality and provide a natural habitat for aquatic life.

Key Characteristics

Appearance: It features round, bright green leaves that resemble miniature lily pads. The undersides of the leaves are "spongy," containing air-filled tissue that keeps the plant buoyant.
Root System: It produces long, trailing roots that cascade into the water column. These roots provide excellent hiding spots for fish fry and shrimp and serve as a surface for beneficial microorganisms to grow.
Flowers: In ideal conditions, it produces small, delicate white flowers on slender stalks.

Benefits to Aquariums & Ponds

Water Filtration: It acts as a natural filter by efficiently absorbing excess nutrients like nitrates and ammonia, as well as heavy metals, which helps prevent algae blooms.
Natural Shade: The dense floating canopy provides shade, helping keep reclusive fish calm and limiting light penetration to manage algae growth below.
Refuge: The roots and floating mats offer a safe haven and spawning refuge for breeding species and young fry.

Care Requirements

Lighting: It thrives in shade or part shade, medium light conditions.
Water Movement: Prefers still or slow-moving water. High surface agitation or water droplets on the tops of leaves can cause the plant to rot.
Nutrients: As a "heavy feeder," it may require liquid fertilizer if leaves begin to turn yellow or pale.
Maintenance: Due to its prolific growth, regular thinning is necessary to prevent it from completely covering the surface and blocking light to other plants.

Important Precautions

Invasive Potential: Amazon Frogbit is considered an invasive species in several regions, including parts of North America (e.g., California).