The lifespan of a semi-aboveground pool depends on the lining, but they last between seven and 15 years on average. This is right in line with what you can expect from a standard aboveground pool. In comparison, an in-ground pool can last up to 75 years with a well-maintained concrete liner.

Yes, you can absolutely use a sand filter with a saltwater pool, but you’ll have to make sure you have the right grade of sand to catch smaller particles, just like in a standard pool. To choose the right pool filter, consider the degree of filtration you’ll need. Cartridge or diatomaceous earth filters can remove smaller particles, so they’re better suited for a less chlorinated saltwater pool.

Calcium lumps in a pool are calcium deposits that form when a pool's water parameters are not in the normal range. They can float around on the surface of the pool water, making it look and feel dirty. The most common causes of calcium lumps in pools are calcium hardness above 1,000 ppm, alkalinity over 120, and a pH over 7.8. Keeping your pool’s calcium levels, alkalinity, and pH levels within the normal, safe ranges is the best way to prevent calcium lumps and other problems, including damage to the pool surface.

Off-season pool-building prices often align with the time of year you're least likely to use a pool. Many contractors offer deals in the late fall and winter to bolster the slow time of year. However, if you live in an area with freezing winters, you'll need to wait beyond the final frost and threats of extreme weather.