Green Star Polyps (GSP) are perhaps the quintessential beginners’ coral because they are extremely hardy, fast growing and don’t need a lot of light to grow. While they are tolerant of intense lighting (if properly acclimated), it is not a requirement. GSP grow in an encrusting mat and will grow on just about any aquarium surface, including the aquarium glass, plastic, live rock and even other corals. Due to their ‘mat-like’ growth, GSP can be peeled off and attached to other surfaces if desired. Corals such as this can be attached to surfaces using elastic bands to hold them in place until they ‘take root’. Due to their fast-growing nature, some care should be taken when positioning this coral, as it can rapidly cover rockwork and begin growing in unwanted places. Ensure that this coral is placed away from filter inlets and overflows to avoid accidently clogging. A razor blade may be used to remove unwanted growth from this coral.
Growth control is most easily achieved by placing this coral on an isolated piece of rock-work in the substrate to prevent unwanted spreading. This situation is perhaps most ideal, as it allows the hobbyist to enjoy the coral without being concerned about unwanted growth. When kept in this way they look great, pretty much always expanded, moving slightly in the current and resistant to hermits that often clamber over and through the polyps. Growth rates will increase when nutrient levels are high.