Since your TC is 8.9 and your FC is 8.1, that means your CC is .7--and that's not good. It looks like you have something you need to metabolize and that means a good shocking is in order

Contrary to what everyone else is telling you I would try to RAISE FC 7ppm to 15ppm. I cannot tell you how much bleach to add because I don't know how many gallons you have, but you need 1 1/8 gallons of 6% bleach for every 10,000 gallons in your pool.

Or 1 1/3 gallons of regular (5.25%) bleach for every 10,000 gallons.