Abstract: Aquarium feeding systems are disclosed. In one aspect, a system (10) includes a flotation base (20) adapted to float on water, and a feeding apparatus adapted to be repeatedly inserted into and removed from the flotation base (20). In one approach, the feeding apparatus comprises a flotation insert (30) and a food tray (40). The food tray (40) comprises a plurality of apertures (46) sized to allow passage of aquatic food into an aquarium. In another approach, the feeding apparatus comprises a clip (130) suited to hold seaweed or other food materials. In another approach, the feeding apparatus comprises a basket (230) for holding food materials, the basket (230) having one or more apertures (246) sized to allow passage of aquatic food into an aquarium.