no ,7 is very good.
Most folks tend to run a little higher in an effort to improve calcification,ie speed up coral growth that is why 9- 11 is normally recommended.
7 however is what natural seawater would test at.
I have always run in the 9-11 range but now i am trying lower levels closer to NSW
providing calcium is within normal levels it won't be a problem.
However If for example you had a calcium level over 500 you may have a problem with such high alk.