Suggestions for my toadstool?

I haven’t seen this open up in months now. Every once in a while I see some green but nothing like what it used to be.

This moved from my old 20 gallon to a 100 gallon about 8 months ago.

My thoughts here are too much flow?

Other side of the tank has torches and they’ll all doing fine. Zoas doing fine as well. Just not the toadstool.