Feeding Clip Attachment for Mag-Float Algae Magnets from Gulfstream Tropical. Choose from Small/Medium or Large/Large+ sizes The Gulfstream Tropical Feeding Clip can be easily attached to the side of acrylic or glass tanks, and provides a stationary food source for freshwater or saltwater fish. Food will not fall to the bottom providing your fish with more opportunity to feed. Simply pinch the seaweed food product in between the clips and let your fish swim around at their leisure to enjoy a tasty treat.