Pool Mate 18x33 Ft Blue/Silver Premium Oval Solar Cover, 10-Mil

Yes, for the right buyer. The Pool Mate 18x33 Ft Blue/Silver Premium Oval Solar Cover, 10-Mil ranks #8 in our Best Solar Pool Covers list. Its biggest strength: 10-mil thickness lasts noticeably longer than the 8-mil Deluxe version at the same 18x33 oval size. The main caveat: costs more than the 8-mil Deluxe oval cover for the same footprint.

The main trade-offs owners and reviewers point to: costs more than the 8-mil Deluxe oval cover for the same footprint; heavier than the 8-mil version, more effort to remove and store without a reel; smaller review base (520) than the budget 8-mil version of the same size.

10-mil blue/silver polyethylene bubble construction, 18x33 ft oval sizing, Raises water temperature up to 10-15 degrees F in full sun, Reduces evaporation by up to 95% and Reflective silver underside.

Worth comparing: Blue Wave NS492 12x24 Ft Oval Solar Blanket for In-Ground Pools, 12-Mil Clear, Blue Wave NS510 12x24 Ft Rectangle Solar Pool Cover, 12-Mil Clear and Pool Mate 18x33 Ft Blue/Silver Deluxe Oval Solar Cover 8-Mil. Each ranks near it in our research for a slightly different buyer.

It's sold on Amazon. Prices and stock change often, so check the current listing before you buy, our link takes you straight to it.

Above-ground pool covers hook to the top rail of the pool wall using an elastic cable or winch-and-cable system, so the cover only needs to match the pool diameter plus a few inches of overlap. Inground pool covers anchor to the surrounding deck, which sits at ground level, so the cover has to extend well past the water's edge onto the coping and deck itself. Standard inground winter covers add a 4 to 5-foot overlap on every side (a 20x40 pool needs roughly a 25x45 cover), and safety covers are measured to the exact deck anchor points, which is why safety covers are far more often custom-fit than stock-sized. Buying an above-ground-style cover for an inground pool will leave gaps at the edges regardless of how it is anchored.

That depends entirely on who has access to the pool. If small children, pets, or anyone unable to swim can reach the pool area unsupervised, a winter tarp is not adequate protection, it is not weight-rated and can fail catastrophically under a person's weight, especially once pooled rainwater or snowmelt sits on top of it. Local and state codes in many areas require a compliant barrier (fence, cover, or both) around residential pools; an ASTM F1346-rated safety cover satisfies the cover portion of that requirement in jurisdictions that allow it. If the pool area is already fully fenced with a self-latching gate and unsupervised access isn't a realistic risk, a winter tarp is a reasonable and much cheaper choice for keeping debris and sun out during the off season.