well i think i am still a beginner to, and i have no idea wat to do about the ick,
but they would benifit from a bigger tank if you have one available (or convince you boss to give them to a pond or something)
goldfish are coldwater fish, so even being inside is a reletively high temp, no heater is nessesary
im not sure about the ph, but if they have been in a low ph for a long time, then i dont think that is an immediate problem (i never test for ph as goldfish are quite hardy (depending on type))
just an after thought, male goldfish will display white spots on their gills (when in breeding condition) so are you sure it's ick?
dont know if that will be any help, and please feel free to correct me (im still learning!)