Been fighting algae for the past week. Shocked twice unstabilized shock, added polyquat a a week ago water clear but green on sides & bottom when brushed shocked again three days ago and added a copper based 50% algaecide, levels seem good ph about 7.6, alkalinity 90, acid a little low, chlorine has stayed above 3 the whole time. algae seems better just a little green this morning when brushing. why isn't the chlorine level coming down? ordered taylor test kit yesterday! been testing with test kit and strips to confirm and they both seem to agree. Use 3 inch pucks for chlorine