Lysimachia is a genus of plants that includes several species that can be grown submerged in an aquarium. One commonly available species is Lysimachia nummularia, also known as creeping Jenny or moneywort.
Lysimachia nummularia is a relatively undemanding plant that can thrive in a range of lighting and water conditions. It has bright green, round leaves and produces small, yellow flowers. Its trailing growth habit makes it a popular choice for creating natural-looking aquascapes.
To grow Lysimachia nummularia in an aquarium, you will need to plant it in a substrate such as sand or gravel. The plant should be trimmed regularly to keep it from becoming too dense and to encourage healthy growth. Lysimachia nummularia can also be propagated by taking stem cuttings and replanting them in the substrate.
It's important to note that while Lysimachia nummularia is generally safe for aquarium use, some other species of Lysimachia contain toxic compounds and should not be used in aquariums. Be sure to research any plant before adding it to your aquarium to ensure that it is safe for your fish and other aquatic inhabitants.