Has anyone used Brandt Indicate 5 in their sprayer water supply tank? There has been a lot of talk recently on the loss of effectiveness on herbicides, pesticides and now even fungicides due to high pH/hard water. This brand surfactant supposedly changes the color of your water as it lowers your pH. A lot of farm wells are 7-7.5 or greater. Ideal is around that 5.5. According to label, you add enough of this product to get the water a pink color and that indicates a pH level in that 4.5-5.5 range. Of course the rate all depends on how high of pH or "hard" your water is. Just curious if anyone has tried it. Thanks!