What type of winter cover would be recommended for my in-ground gunite or vinyl liner pool?
For both types of pools, it depends on what your needs are. If you simply want to cover the pool for the winter and do not worry about children or pets entering the pool, you can use a simple winter cover. Regular winter covers catch leaves, debris, etc. from entering your pool, making spring clean up easier. They also protect against algae growth by blocking sunlight. If you have children or small animals anywere around your home, you will want to look into pool safety covers. In order to be considered a "safety" cover, a cover must be able to hold a minimum of 485 pounds per five square feet. They are made of solid or mesh material that is stretched taunt enough to withstand pressure. These types of covers are perfect for covering your pool for the winter or other long period of time and will take away the liability of an uncovered pool.
We would recommend a safety cover for both types of pools. Safety Covers are designed to protect both your pool and your family. Pool covers are manufactured to your specific pool size and shape, when properly installed; the safety cover will help prevent accidental intrusion by children and pets. These covers also allow water to flow into the pool without debris. There are various types of Safety Covers, both Solid and Mesh depending on which application best suites your needs.