Jack Sparrow wrote:The Taylor K-2006 kit only goes as high as 5.0ppm for FC. I'll keep looking for something that goes higher.
The K-2006 is an excellent kit for the money. If you want to test over 5.0, just dilute your sample 50/50 with distilled water and double the test result. Voila...it now tests up to 10ppm.
As for ph minus, the cheapest and best is to use Muriatic Acid (aka Hydrochloric Acid). It is sold at hardware store and Home Depot for cleaning masonry. It's wicked-powerful stuff...a cup or so brings my 21,000 gallon pool down a few points. A gallon will run you about $5.00 and last a long time.