Description
Plant info
Type:
Floating plant
Origin:
North America
Country or continent where a plant is the most common. Cultivars arise or are bred in cultivation.
Growth rate:
High
Growth rate of the plant compared to other aquatic plants.
Height:
3 – 5+
Average height (cm) of the plant after two months in the tank.
Light demand:
Low
The average or medium light demand of an aquarium plant is 0,5 W/L.
CO2 :
Low
A medium need in CO2 is 6-14 mg/L. A high demand in CO2 is approx. 15-25 mg/L.
Spirodela polyrrhiza (giant duckweed) for Singapore tanks
Spirodela polyrrhiza is a fast-growing floating plant supplied here as a clean 1-2-Grow! culture, which is a real advantage: starting from a pest-free portion means you avoid importing the snails and algae that often ride in on duckweed from other tanks. Its larger fronds and trailing roots make a useful surface layer that shades the tank and gives bettas and gouramis somewhere to feel secure, a popular pairing in local community setups.
It is a low-light, low-CO2 plant that earns its keep as a nutrient sponge, pulling excess out of the water to help starve algae, which suits bright Singapore rooms prone to green water. The trade-off is its speed: it multiplies quickly and will cover the surface, so plan on scooping out handfuls each week to keep light reaching the plants below. Leave an air gap under any lid so condensation doesn’t scald the floating fronds.
See our full floating plants range for alternatives. Read our roundup of the best floating aquarium plants and our floating-plant aquascape guide to plan your surface.
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