There are a few things you can do to clean the bottom of a pool without using a vacuum cleaner. First, use a plunger to suction onto the bottom of the pool and pull. This will cause water to flow out from under the surface and help remove any dirt, debris, and leaves that may have built up on the bottom of the pool. Second, use a vacuum cleaner to clean all of the dirt and debris that has built up on top of the pool. Make sure to turn off the vacuum cleaner before cleaning so that it does not damage any equipment or walls in your pool. Finally, use a bucket or other large object to push all of the water and dirt out from under the surface of your pool. This will help make sure that your pool is completely clean and ready for swimming!