This variety of Japanese Dwarf Pennywort can thrive in low to high lighting. It tends to grow densely and horizontally in high lighting, and it grows much more slowly, loosely, and horizontally in lower lighting. Its trimmings can be replanted to increase the size of the mat. If used for carpeting the aquarium, it should be trimmed weekly to promote horizontal growth. It does not require substrate, but does seem to absorb some of its nutrients through its roots when planted in substrate or attached to another surface. It will also sometimes even grow over rocks and mats. It will also benefit from CO2 supplementation, but this is not required. In fact, it will require much more frequent trimming when CO2 supplementation due to the dramatically increased, denser growth rate that such supplementation will promote.