Quote Originally Posted by mspool
Thanks for the fast reply. I don't have a test kit that will measure chlorine that high. I can order one but what should I do meanwhile. how many pounds of the granular hypochlorite should I add to get it up? any suggestions. and I will shut off the chlorine feeder right now. and just sanitize with the hypochlorite until it is gone. then I am thinking of switching to bleach. does this strategy sound ok?
To test higher levels, dilute your sample with distilled water. Take a clean glass like a shot glass full of pool water and add it to a clean container. Add 4 glasses of distilled water to the container and mix. Then test the mixture. Multiply your ppm readings by 5.

I would start using bleach right now. No side effects like other forms of chlorine.