Thanks Richard,
Since this is somewhat of an experiment I will make it hard on myself and not hard wire things just yet. That means I have some wiring to do to tie it into the pool pump feeder after the timer and switch. That also means I need a neutral for 110V (for the chem pump).

I am planning to use a plain 5 gallon bucket which is the white plastic kind. The tubing is translucent rather than opaque white, So I will try to keep it under other plumbing so it doesn't get sun. With the short run (6') and considering the volume of 1/4" OD tubing, I don't look for the chlorine to be in the tubing for long enough to matter.