'Invisible cover' being used at Norwich swimming pool - EveningNews24: "A liquid based cover is always present in the water and when there is no movement in the pool, the molecules race to the top, making an invisible barrier which holds the heat in."
Wednesday, March 10, 2010
'Invisible cover' being used at Norwich swimming pool - EveningNews24
Perhaps a pool like this could be built on the South Side?
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