Hemianthus callitrichoides is one of the smallest aquarium plants in the world, and creeps over the bottom with millimetre-sized, round leaves. Hemianthus callitrichoides is an attractive and popular foreground plant for small aquariums.
It is not a difficult plant, but it requires good conditions such as enough light, added CO2, water circulation and fertilizer to thrive. If these conditions are hard to create, you may use Micranthemum ‘Monte-Carlo’ as an alternative, as it is less demanding.
Small pearls or bubbles of oxygen are often produced on top of the plants, adding a very lively aspect to the carpet.
If planted in small clumps a few centimetres apart, it will spread rapidly and cover the bottom like a carpet. Trim the carpet regularly, otherwise the lower parts will not get enough light causing root death.
Found on Cuba, west of Havana.

Plant info
Type:    Carpeting    
Origin:    North America    
Country or continent where a plant is the most common. Cultivars arise or are bred in cultivation.
Growth rate:    Medium    
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:        
The average or medium light demand of an aquarium plant is 0,5 W/L.
CO2 :        
A medium need in CO2 is 6-14 mg/L. A high demand in CO2 is approx. 15-25 mg/L.