Jason's Mystery Reef Problem

Sometimes reefing challenges us. It challenges us all, even veteran Reefer Jason who recently reached out to see if I could come take a look at his tank and see if there is anything obvious he is doing to cause his SPS to lack the colour and growth that it had just a few months prior.
What did I do?
I managed to convince him to let me film our conversation and share it on RUclips to see if anyone out there has a good suggestion on things to look into to solve the mystery!