Eleocharis acicularis, commonly known as dwarf hairgrass, is one of the most popular foreground carpeting plants in the aquarium hobby. Its fine, needle-like leaves grow in dense tufts that spread via runners to gradually form a natural, grass-like carpet across the aquarium floor.
It is a practical choice for low-tech aquariums, growing under medium light without CO2 supplementation. Carpeting is slower without CO2 but still achievable with a nutrient-rich substrate and patience. Adding CO2 injection significantly accelerates both growth and lateral spread for those wanting a faster result.
Supplied as an established potted plant, Eleocharis acicularis suits aquariums from 30 litres upward. It is best planted in small tufts spaced a few centimetres apart across the foreground, allowing the runners to connect and fill in the gaps over time into a seamless grassy carpet.