Keep feeding the anemone small pieces of food if it will accept it, daily. It is especially in need of food if it is in a shaded area and is bleached. Hopefully, it will color back up and find a place in the light.
I'm not sure if this is directly affecting your anemone, but your water parameters are a bit off. Do you test your water and dose cal, alk or mag regularly?
First, your mag is low and should be raised to at least 1250ppm. Also, your cal is low and alk is on the low end of acceptable range. After the mag level is brought up, you should then be able to bring up your cal and alk slowly to acceptable ranges. If you do choose to make any changes, do it very slowly to avoid stressing out the anemone any further. This includes more water changes if your nutrients are already low.