Even though flourescents vary widely in aparent color, if the room is
mainly lit with them, a cc30 magenta will almost perfectly correct any
flourescents under which I have shot with any brand or speed chrome I
have used. These are pricy in glass in a too-thick rim from Tiffen
(I try to remount the glass in thinner rims, but sometimes the glass
diameter is not compatible with the intended rim). Cheaper are the cc
gelatins from Kodak in 2" and 3" squares that can be cut down to fit
loosely behind a UV filter on the lens (or you can mount them in Kodak,
Nikon, etc. mounts to fit in gel frames - they are easier to handle
without damage). When there is a mix of daylight and flourescents,
FLD filters work well, leaving daylight areas a bit magenta, and full
flourescent areas a bit green (they are about cc20 magenta).
If you add flash fill, use the oposite color on the flash (30 or 20
green works well for cc30M or FLD). To check colors to see if oposite,
put them together on a white surface - the combined colors should be
grey. Hope this helps.