Remove the lead weight and sponge from the stems and plant each stem individually into your substrate
Ludwigia Senegalensis is a beautiful stem plant which can develop a red vein-like pattern on the leaves. The red coloration becomes more pronounced under high light with the addition of iron and other micro nutrients. This plant is considered rare and not commonly seen in the aquarium trade as very few farms currently grow it.
Propagation can be achieved by taking cuttings from the main stem of the plant that are replanted into the substrate.