eLowther91, for one thing any large angelfish will not be manageable in a 75 gal tank for too long, for as they need larger tanks to have a large swimming area and that however is only one of the things required in keeping such fishes.
Im always somewhat puzzled how so many hobbyists keep loosing their triggers. For one thing, i found through the years when I had to cure any triggerfish of ich, that they to me appear to cure far easier then any other fishes. That not includes groupers, for I kept fewer groupers through the years, due to the growth of many.
The last triggerfish that I bought and treated for ich, was a QT (Queen Trigger), and it by my amaze once ich began to show, the ich had cleared completely up inside of the first 24 hours. Of course I keep it in the QT for the full amount of time normally required when one needs to treat for ich.
And im sorry catpicklesdog, but I would never keep a large growing angelfish in even a 100, but rather 300 or better, with the exceptions of a 240, but is not overstocked. Of course, that is my .02 cents worth.
eLowther91, you cannot go by the size of your trigger that it is 5" at the time, for in stocking any aquarium, one must stock according to the normal growth size of that species and not while its still in its juvenile stages.
Buddy