Pond pumps are used to run filters, create water falls, operate fountains, and to circulate water within the pond. PetSolutions offers both internal and external pond pumps for all sizes of ponds. When choosing a pond pump, make sure you review the gallons per hour (gph). This is important so that the flow of the pump matches the requirements of the filter, fountain, or size of the pond. Water flowing too quickly through a filter or sterilizer will make it less effective. Water flowing too slowly will not provide enough circulation to clarify the water.