75 gallon? Six or more, but they would have to have compatible temperaments or you would end up with bullying.

Get the right mix and you could have a really gorgeous display- skip belly heat and go for sunlight like heat to encourage them to climb and sun instead of lurking in warm hides.


some species are happier to climb and sun than others. My Butlers spend all day in their fake treetops, while my puget remains stubbornly hidden. Go figure.
albinos prefer to hide from light, so don't take this advice as a blanket statement. Albinos need their dim lairs.