Whats wrong with a traditional pool cover or solar blanket?
The bubble pack blanket is made from polyethylene, an opaque plastic. They generate almost no heat and what heat they do generate is surface heat. The general recommendation is to cut the blanket to precisely fit the swimming pool to get the maximum heat. This causes mustard algae due to lack of direct sunlight and alkalinity due to the inability of the decomposition products of the pool chemicals to escape into the atmosphere. The bubble pack solar blanket is inefficient.