If you are looking for smaller, nano sized grass, we'd suggest the tissue culture version which you can find here - Eleocharis Acicularis 'Mini'
A low-growing Eleocharis that forms runners close to the parent plant. It is prettiest planted in small bunches quite close to each other, which will gradually form a solid mass of plants. An ideal foreground plant, equally suited to large and small aquariums.
Plant in 5 cm pot.
Eleocharis Parvula - Tropica Pot
Type: Carpeting
Origin: Cosmopolitan
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 - 10+
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.