If you have an inground pool, these are a must have! Especially if you have dogs that like to swim. We keep one on our skimmer basket at all times. It’s amazing how much dirt, bugs and even pollen that is stopped from going to the pool filter. Our dog thinks the pool is her personal water spot. No keeping her out. We had to leave her in the house, due to her fine undercoat. Dog hair is #1 reason for pump failure and clogs. Now the entire family can enjoy the pool.