Uniqueturk90,
If your water source is between 6.5 to 7.5, I wouldn't bother ph'ing at all.
If after you mix your nutrient, the ph is less than 6 i'd consider raising it to 6.5.
But generally speaking if it's a good soil, you shouldn't need to worry about the ph of your water at all.
The soil will stay buffered.
It's synthetic nutrients that generally aren't good for soil. Happens a lot in agriculture. Soils become sodic, causes compaction etc. Crop rotation is important too.
It's a little counterproductive for the soil microbes too. Because the nutrient isn't organic based, the microbes have less food.
In a completely organic setting, the organisms break down organic matter into available forms for the plant.
Synthetic nutrients skip this process, nutrients are available for the plant right away, but at a cost to the life in the soil.