even if 1 scoop produces a light link?

i seem to still be losing FC over night. last night i added chlorine, and took a measurment a little later and it was 20.5ppm. i then used the calculator and it said i needed 2 qrts 6 0z to get 25ppm, so i added that amount, checked later ( this was all late in the evening ) and i measured 19.5ppm. this morning i measured 15.5ppm, came home today and measured 10.5ppm. CC measured this afternoon is .5ppm

so a while ago i added 1 big jug and measured 19.5ppm. according to the calculator i need 2 qrts 3 cups to get 25ppm. ive added all this bleach in the last hour and a half or so, so ill test FC in just a bit.

i have been brushing the floor of the pool in the evening after adding my bleach.

the good news is that the filter came today. its a baleen filter, i actually thought i was ordering some other named filter but this is what i got. does anyone know if these are good filters? its seems to have a better filter medium vrs the orginal factory one. i noticed that when i installed it it took a litte effort to install it onto the tube at the bottom of the filter housing, i remember that the factory one used to fit nice and snug, but not any more... anyways while testing this afternoon after it was in there for about 2 hrs i seemed to already be able to see some improvement in clarity! i have the pump running on low.