A vinyl liner is less porous than concrete and fiberglass, making it much easier to keep your pool clean without using as much chemicals. Additionally, a liner's smooth surface makes it less prone to algae growth and other contaminants than a concrete or fiberglass pool.Often, a vinyl liner can last up to 10 years or more, which can save you money in the long run. However, like any product you purchase, a liner will eventually need to be replaced.