After looking at them for some time I finally took the plunge and purchased a Milwaukee Phosphate Photometer today. It should arrive early next week. The Photometer should provide for very accurate testing of phosphates compared to most kits which either do not go into the low range or are very hard to read. The range of the meter is 0.0 to 2.5 with an accuracy of +-0.04. I would be willing to test anyones water if you are wanting to get a good idea of where you phosphates are for $1. This money is just to help cover the cost of the meter and the reagents.