Anemone On Glass at Top

DGAM

Premium Member
I've had my anemone for a month or so now. He stayed on a rock towards the bottom for a few weeks but a week ago he climbed up the glass and into the corner. Why is it doing this? What can I do to make it come down to the rocks? Thoughts on what the deal is?
 
Give it a rock that is closer to the top of the tank where the light is, and a little flow.
 
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