Red planet turning slightly green

I know that it's because of low light but it have a maxima clam at about an inch lower that is thriving and growing everyday but for some reason this red planet started becoming green and the tips are becoming green now. Polyps are extended but not very. Flow is high and all is 11 calc is 440-450. Maybe it isn't happy? But theres not any other place to put it in terms of an equilivent amount of light. I can change it's flow or put it in lower light and lower flow.