Never seen such development in a week personally, especially in Rams in what semed to be well maintained tank, hopefully even with varied diets..
Usually higher chances of HITH in tank with large CIchlids which were fed feeders.
Although have tried Metronidazole based med such as Hec-a-Mit by Aquatronics (no longer avail but metro by Seachem may still be), none cured/healed such infection/symptoms.
Couple more close up shots possible?
I dont know what Mel would do with HITH as it is our understanding HITH is primarily caused by excessive # of Protozoan, Hexamita, in the gut afa I know + possible dietary issues along with prolonged exposure to extreme water conditions which your tank do seemed fall into at least...
I would not run UV after the problems if one already has one but wouldve ran continuously in hope of minimizing any chances of any infections. Properly operated UV now may assist further spreading of this pathogens to other susceptible fish.
Dont know what else to tell you other than hope that this male does not follow its mate's foot step in such short time.
If q/t is possible, try isolation. If memory serves, Epsom Salt may assist in slowing down the disease in q/t.
Google for such info.
Good Luck!