ok false alarm on the wrasse, he came out tonight for some shrimps. I'm seriously thinking it was the alkalinity for the montis, now that the alk is stable the bleaching has stopped (as far as I can tell). The angel dying is a mystery though. There haven't been any new additions either. Also the new RO membranes giving a higher TDS. I guess the possibility of foreign contaminants are always possible, as I work in construction and handle different weird materials daily. Maybe it doesn't always 100% wash off, who knows