7.5 is basically neutral. It is ever so slightly to the basic side, but not much. If the fish are properly acclimated to the water, they should be fine, as long as it is in their range, Most of the fish in the trade can work in almost all tap water. There are some that are more sensitive than others, but they are much rarer. Overall you should be fine. Personally, I'd steer clear of the neons and the khuli loaches. The rest should be very fine.