The first one looked like the base was peeling a week ago, and the tip also has some bleaching. I kept an eye for 1.5 weeks and I don’t see any further issue recession.
The second coral looks brown/greenish.
I will say that these corals are near a power head and a large cloud of soda ash blows directly onto the STN/RTN coral. I started dosing alk and cal into sump and I *think* it stopped ever since.