What type of winter cover is best for an above-ground pool?

Get a solid winter cover with a cable-and-winch system. Mesh covers let in debris and sunlight, causing more algae and chemicals in spring. A heavy-duty solid cover keeps everything out, and pairing it with a small pump for rainwater makes winter maintenance nearly effortless. Cheap tarps with rocks blow off and rip, so spend extra on a proper cover that lasts three winters.