Ozone layer is present in the stratospheric region of atmosphere. It is a pool of ozone molecules.

Ozone layer is a pool of ozone molecules. It is present in stratosphere.

Paged pool memory is a region in virtual memory which can be paged in and paged out of the system. Device driver which do not need to access the memory from DPC/Dispatch level or above can use paged pool. it is accessible from any process context.

A field guide to insects common to your home state or general region will be able to help you properly identify the ants in your pool.

It depends on the size of your yard. You can try Doughboy pools. Evey city has a dealer that sells them, and they can help you decide on which pool is right for you.