I came across Heatsavr liquid pool cover and picked some up to try... so far no difference in temperature. Thought the skimmer might remove the product from the system, but according to the manufacturer a 25% added amount should create equilibrium and the skimmer will not effect performance.
Pool is 16 x 38 = 608 sq/ft surface area
Dosage 4oz per 400 sq ft surface area.
Added 8oz - the 25% overage manufacturer recommendation should have been met.
Initially a film covers the surface of the pool. Next morning skimmer had accumulation of Heatsavr. redistributed from skimmer into pool. Next day no material in skimmer.
Temperature 84F before, 84F after 3 days. I'm going to add a more and check temp again.
Have others tried the Heatsavr product with success?