It really depends on which fish you keep. 7.6 is the same as ours (sig shows what fish I keep) but my African cichlids should really have a ph of about 8.0 so Have added lots of shells to the gravel.
Just to prove that point , I have a pH of 8.0 and keep all sorts of fish that like acid water. It realy is just the stability. I once tried lowering it and lost 3 fish in the process - and I did it very gradualy too.