If you're using bottled nutes, do what it says on the bottle. Ie if it gives a specific ph range, you'd be better adjusting to that range. I've never used their bio nutes, so I don't know what they advise, but ran their coco a&b for years. Look at their website, loads of info on there.
My advise would be to drop the bottled nutes for organics, use compost, EWC & meals to feed your soil and let your soil feed your plants.