there are lots of articles are in past PB issues on water testing parameters and what they mean. Every issue since May-Jun 2015 has had a water chemically oriented article by Dr.Boyd. He discusses well each topic. See these links below to prior PB issue topics for the last couple years. You will have to scan each issue for the water chemical topic. What other pond water testing - chemical info are desired or wanted?? Quote by QuarterAcre: ""more along the lines of what the results mean and how to interpret.""