Using Fox Farm's Ocean Forest Soil

[Ed Brown]

Go to Amazon's comments on this stuff. Someone is growing in FFOF and is loving the stuff. Another comment doesn't mention the soil brand but says they are maintaining a ph of 6.2-6.5 using rainwater.
It appears you are going to be OK.

I use FFOF with FoxFarm Big Bloom, Grow Big, and Tiger Bloom. I can vouch that it is amazing products! I havent had to mess with my PH once and I use tap water.