I am having a hard time figuring out my pH reading from my API test kit. When I use the standard pH it is the blue that indicates 7.2 or higher. When I go to the high range test I get a pink color that is not really close to any other colors on the chart. My well water test 7.4 on the high range kit and 7.2 on the standard kit. I have some rocks in my tank which I understand can raise my pH but I also have three very large pieces of driftwood. The date on my kit is January 2010.