Ph is a big issue that you will need to address. My wellwater is 8.0ish, and I adjust using General Hydroponics phDown. (phosphoric acid) A little goes a long way, and no adverse effects. The higher your water ph, the quicker the buffering (usually lime, added by the manufacturer) in the soil depletes, and the big problems start.

I agree with crabbyback. ixnay on the utesnay. FFOF has the necessary nutes for the first month or so, and then ease into the nutes per the schedule. I know the specs on the FFOF mentions to add the Big Bloom...but with the ph stress, might be a good idea to wait on adding more BB for a week or two. (or until the ph issue is resolved)