Hoping this is not too dumb a question. I am considering adding borates to my pool. I've studied all the stickies, etc. and am confident I understand the process. I do have one question I have not seen addressed: it seems that borates affect the surface tension of the water (I've seen posts where folks have mentioned that the meniscus goes away). Given that, is there any chance that borates will affect (increase) the evaporation rate? I live in Tucson where water is somewhat precious and I wouldn't want to do anything that would add to my water use.