Yes another PH question

My grow medium is pro- mix with some worm-castings and 1/8 Happy Frog then 25% perlite- a mixture recommended by my grow show owner- I will say a little hot using Fox Farm products- my nute mixed water is going in at 6.5 and my run off is 6.8 should I be OK with this ?I turned 12-12 this past week- I have seen a lot of PH questions in past but this is my first time asking, be gentle :)