here are my most current readings:

cya: just under the 30 mark
chlorine: 6
ph: 7.2
alk: 140

i added clarifier to the water a few nights ago. the brown stuff on the bottom seemed to get larger in size. i put the filter to waste and tried to vacuum it all up. I also put a sock on the skimmer basket. This morning there were still some brown spots on the bottom, just like dust when i go over it. i am wondering if when i am vacuuming it is stirring it up into the water? and then settling back down when i am done. I filter the pool 24 hours a day. Should i normally be doing less? The water is very clear, just the spots on the bottom now.

thanks again for your time/suggestions!