I've always been told it's evaporation. I can see the steam rising off my pool in our cool still nights.dadwright said:Secondly, the main loss of heat is not from evaporation, but from radiation of heat from the pool water to the air.
If your pump is running so strong that it creates a vortex, then you would be right, but usually the water flow isn't that high so the product remains on the surface. Also, any product going through the filtration system will end up going right through any filter and back into the pool. The molecule is far too small to get caught in any filter. It might get caught by some types of clarifiers, though even that may not happen since the molecule is uncharged (though the alcohol end is polar).dadwright said:they will be skimmed off the top of the pool the first time the filter runs.
Isopropanol is just a carrier and evaporates. The active ingredient that remains is typically a long-chain alcohol such as cetyl alcohol or stearyl alcohol as described in this post and this post.gbobbage said:Has anyone tried using Isopropanol as a liquid cover? Looking at the safety datasheet heatsavr is 95% IPA.