Yup , it only goes to 5...but you can still use it with your pool .

The important thing is knowing where you're at and how much bleach you need to use. For example , lets say your at 3 ppm , if you add enough bleach to go up 2ppm , get you to 5.. if you are at 4 , going up 2 would put you at 6.. over the limit of the kit , but using educated guess , you'd know its there

I couldnt even begin to do any of that without MWsmiths Bleach Calculator . if you dont already have it ...

http://home.earthlink.net/%7Emwsmith...achCalc262.exe