The Seaweed Clip is an excellent tool for feeding the "Seaweed Selects" from Ocean Nutrition. In order to keep grazers fit, algae needs to be readily available. The clip is for use underwater and adheres easily to acrylic or glass surfaces thanks to its suction cup. The Seaweed Clip holds the seaweed underwater for the fish to feed upon and helps promote a very natural feeding by allowing fish to pick at the food, little by little, over an extended period of time.