Low Ph

[Norstar]

Hi

I set up a saltwater tank approx. 2 weeks ago, and I've noticed I have a low PH reading of 7.7. I have some cured live rock in the tank, and the lights are on approx. 6 hrs a day. I haven't done a water change, and I don't know about the other parameters yet.

Should I be concerned about the low PH? If so, would baking soda raise it?

Thanks

Camille