Ludwigia repens is one of the easiest red plants to grow in the aquarium, being able to grow in even lower light conditions. It also makes an excellent candidate for moderately lit, non-CO2 aquaria. When lit well, the plant will grow at an angle over the substrate instead of straight up. To encourage red coloration, Ludwigia repens should be kept well-lit with no shading and heavy iron dosing will help produce intense colors out of this plant.
Just like fish, living plants do best when they are kept in an aquarium that best suits their needs. Selecting live plants that share common water conditions will minimize problems and make it easier for you to maintain and keep your aquarium in tip top shape.