Here's where to get the bleachcal program that we've been talking about.

Note that this program is designed to give you the amounts of chemicals to add to achieve the desire CHANGE. Not the end level.

So if you want to increase the chlorine from 10 to 15ppm you put in 5. That's the increase you want.

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

This great little program was created by a forum member. Micheal Smith.

Also when you get your chlorine levels above 5 everything reads the same .. as you've discovered. ORANGE.

To get a better indication until Ben's kit arrives, get some distilled water.

Make a 50/50 mix of distilled water and pool water, put that in the test vial and run the test as instructed. Then if you get a color in the test range, multiply the result by 2.

If you still get an orange Over Max reading then change the dillution to 3 parts distilled to 1 part pool water. Multiply the result by 3. This should get you close. At least it will tell you if you're closer to 20PPM than 6PPM

Good luck.

PS The brushing is real important with this kind of algae. It will form a layer of dead stuff that sheilds some live stuff underneath. You need to brush that dead layer off real well and frequently to expose everything you need to kill.