You didn't read much about the products did you. The stuff in the water saver that slows down the evaporation of water is a proprietary biodegradable chemical blend that apparently has little to no toxicity to humans. The chemicals are added to the water (pool, lake, reservoir) where they dissolve, creating a chemically saturated solution. The nature of the chemicals concentrates them near the surface where they must increase the surface tension of the fluid enough to reduce evaporation without causing a big change in the overall behavior of the liquid. Rain doesn't change a thing. Jumping off a diving board and splashing this stuff all over the concrete surrounding the pool doesn't change a thing. Some of the product is sold in either prepacked, easy to use portions for us dumb laymen, or in bulk for large scale commercial users. The product is a commodity that wears off over time and must be replenished. Where it saves water, it costs money. This creates a stop limit to its effectiveness in our marketplace, but as water becomes more scarce through drought, draining of aquifers, and wasteful practices, products like this will become a necessary expenditure. If your question is referring to their agricultural products, I'm afraid I won't help you there.