The size of the pool pump depends on your pool’s volume and filtration system. A pump should be capable of circulating the full volume of your pool within 8 hours. Consult your pool’s specifications and a professional to determine the optimal pump size for efficient performance. It is important to match your pump’s flow rate to the acceptable flow rate of your sand or cartridge filter. An excessively strong pump can damage a smaller filter and will also damage the pump itself.