The effectiveness of bubble-type solar covers is commonly accepted, but of course they’re only effective when they’re covering the pool. So what about the times when you don’t feel like rolling the cover back out? About 15 years ago, Flexible Solutions introduced the liquid solar blanket. Now called Ecosavr, it is designed to conserve heat, water and chemicals by creating an invisible barrier on the surface of the water that greatly reduces heat lost through evaporation. Dispensed through a plastic fish that sinks to the bottom of a pool and slowly drips the product over the period of a month, the product has gained wide acceptance in a relatively short time.
So how does the liquid work? Representatives from the manufacturer claim that the molecules of the active ingredient are lighter than water, so they’ll float on the surface area of the water. The company explains that the molecules are not attracted to each other so they don’t want to stand on top of each other, but they always want to be holding on to each other, so they’ll always connect and form a layer. This way, theoretically, the product won’t really build up in the corner of the pool, it will automatically spread out and form and create a layer by reaching out across the whole surface area.
The molecular layer is transparent; you don’t notice it when it’s in the pool, and it allows solar gain to enter the pool. Solar gain from the sun will heat the pool water and what the liquid blanket does is stop that energy gain from leaving. It can slow down evaporation by 30 to 40 percent, sometimes up to 50 percent, depending on variables like weather, temperature and that kind of thing. If you don’t heat your pool, your main benefit is going to be reduced heat loss overnight, because a lot of people who don’t heat their pools experience a drop in heat overnight when the air temperature goes down
Representatives explain the concept as similar to how a car may leak oil and leave a thin film on a puddle that you can see that over the surface of the water. This product works very similarly only the layer that it’s creating is biodegradable, transparent and totally safe for human interaction. It won’t affect your pool chemicals, it’s pH neutral and it’s biodegradable. You should test for yourself whether or not liquid solar covers can excite the mercury in your pool thermometer.