Help with deciding on installing an ozone generator

[Beatit]

We are pricing out options for a fiberglass pool. This is our first pool and have no idea what we should or shouldn't install. We had a preliminary meeting with T&D and the price they quoted included the generator but since we are not savvy pool owners we are not sure if we really need it.

Also, has anyone added a denser mesh on the roof of the birdcage to help with the sun?

We need help from people who know their pool stuff!!!!!

Thanks.