Concrete pools have the longest life span. As long as you properly maintain your concrete pool, you can expect it to last 50 to 100 years. That said, you will need to resurface your concrete pool as it ages. Fiberglass is durable, but fiberglass pools generally only last around 25 to 30 years. That said, some high-end fiberglass pools can last more than 50 years if they’re well-maintained.

The disadvantages of container pools come down to flexibility and customization. Shipping containers come in standard sizes, so the sizes and shapes are limited. They also have a very distinctive look, which may not suit the aesthetic of your backyard. 

Beyond that, while container pools are more affordable than in-ground pools, certain models can be more expensive. This includes the cost to heat your pool, since the metal walls have more heat transfer than other types of pools (which some brands circumvent with insulation).

The steps to fill a swimming pool will depend on your local building codes. However, it starts with draining the pool of all water using a submersible pump. Then your pro will lift the pool shell from the ground or break it into pieces for individual removal. The next step is filling the cavity with dirt and gravel and topping it with topsoil. Once a structural engineer deems the site safe, landscaping can start.

It’s fair to be concerned about handling pool lights or wiring in a pool filled with water. But fortunately, pool lights and swimming pools are designed to make it easy and safe to replace the lights without needing to drain the water. Instead, you can turn off the electricity to the pool as a safety precaution, unscrew the pool fixture, pull it up and out to the side of the pool, then change the bulb.