Doing an experiment with an ORP sensor and want to take 5 gallon of water to O FC, create chloramines (CC?), and then use bleach to make my desired FC levels. I am going to use these values to create thresholds for my bleach dispensing system. I have testkits to make sure the water is a known value.....How can I easily create containaments in my bucket to simulate realworld to setup my ORP??? I dont care if my ORP is really at say 300mv and a calibrated one is 250MV at "x" FC level....I only care enough to dial in a known value based on my test kit and see the corresponding ORP value so I can dial in when to dispense bleach...I am working on the details for timing how much, when to retest, add more, etc.....