My own opinion of Euphilia and Zoanthids outside of this discussion is that sometimes they are very touchy corals. Rarely can folks explain why they close up when they do. Stress, almost surely....but the cause is usually mysterious. Torches are easier than zoanthids, but still touchy and react for seeming mysterious reasons.
So given the amount and nature of corals doing well and the peculiar habits of the ones that are questionable (zoa, euphilia, toadstool) – and given the sighting of some green algae on the glass – it seems like you've got to be in the process of turning the corner on this.
I'm a little anxious to see if nailing >0.10 ppm PO4 (new/higher recommendation) will have a more noticeable effect on the dino's themselves.
