bleach/chlorine evaporates almost immediately after I add my nutrients?

so I have test strips to test for the amount of chlorine/bleach in my nutrient water so I usually add the chlorine/bleach first then test with the test strip to see how much chlorine/bleach is in the water then I add my nutrients and test again but almost immediately after I add the nutrients the test strip says there is no more chlorine /bleach in the water?? so I'm thinking a lot of people are using bleach and thinking that it is helping but it is not doing anything ....I assume the bleach is reacting with the nutrient solution and cancel each other out ...I have tested this with two different nutrients solutions one with flora duo and the other with cyco...another time I just added Cal magic and had the same problem ended up with no bleach in the water once I added it?? so what I'm trying to find out is if anyone knows of a nutrient that is compatible with bleach...I don't think that there is... I had a problem with Pythium root rot and was using beneficial bacteria and fungi which did keep the plants growing somewhat healthy but the roots would still come out brown and nasty with a diminishing yield in my RDWC...I was planning on running a side by side comparisons with beneficial bacteria with fungi and bleach and colloidal silver to test all three separately and that's when I figured out that the bleach is disappearing immediately