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David Hoff is inventor of the patented Solar Roller, the only device for handling 1/2 pool covers. Half Covers are the secret for any shape pool to be covered. It only takes 200 pools using covers to save a 3.5 million gallon tank of city water.

So there's a better way to stop the waste of precious city water, to use HALF COVERS rather than full covers. With half covers, almost any pool can be covered up to L-shaped pools. If there is a better way of doing something that saves billions of gallons of water, then in the wake of drought and water rationing, why aren't all pools being covered?