Sagittaria subulata from South America is an ideal, undemanding foreground plant whose short runners form a compact group.
Place individual plants 2-4 cm apart. This plant may cause problems because in certain conditions it suddenly grows to a height of 50 cm when it grows older. But if it is then moved into the background it may become low again. In the aquarium, it sometimes sends a long flower stem to the surface, and small white flowers unfold just above the water surface. 
Type : Stolon
Origin : South America 
Growth rate : High
Height : 5-30+
Light demand: Low
Co2 : Medium