Sorry about writing on http://www.poolforum.com/pf2/showthr...w-filter/page2

Pump is working normal again after more backwash and rinse. Water looked much better then Sunday's night as in less green. Here's the brief history.

Sunday night: Added 1 gallon of bleach, 4 cups of dichloro out of panic since pump was not working properly.
Monday night: added 1/2 gallon of bleach and scrubbed the pool.
Tuesday night: added 1 gallon of bleach, cleaned the sand filter and pump began to work.
Tonight: plan to figure out how to disable the copper block or remove it and follow up with the expert advise.

Here's my measurement this morning, Wednesday.
FC=0.5ppm
CC=0.20ppm
PH<7.0 so I added 22 drops of R006 for the color to match 7.0
TA=30ppm
CA>100ppm