The Halimeda plant, also called the money plant, from Hawaii is a green calcareous macroalgae found within tropical oceans worldwide. Very shapely and beautiful, it is quite decorative for the marine aquarium. The irregular oval segments of Halimeda appear as several small green coins glued from end-to-end.  This is why it is often called the Money Plant. In order to thrive, Calcium is very important to the hardiness of the Halmedia plant, therefore Halmedia Plants require a sufficient level of calcium carbonate in the water.

Generally hardy in the marine aquarium, few fish will feed on Halmedia, and It is not an invasive plant that will cause harm to close neighboring corals or invertebrates.

In addition to light, it requires a sufficient level of calcium to grow. They are not as tolerant of high nitrate or phosphate levels compared to some other algae plants.