Clown update:
Still no aggression from the female towards the snowflake, in fact she is taking a liking to him better than the current male. The male has let the snowflake into the host at night (or stay nearby), but will still chase him at times, much less often and less aggressively as before. No evidence of biting or fin nipping.
Jose update:
He has made an appearance! He found a nice burrow spot between the rocks. He hung out all day yesterday and semi-actively went after food. Still a little timid, but no longer afraid if you approach the tank. He found a good spot for view, and won't make a big mess, so since he didn't take to the new PVC condo, I'll probably remove it as the helfrichi is currently using it. The white spots I saw early were just scale damage on his head and around his mouth from borrowing, not a fungal infection.
I used the CMAS PAR meter.