Nutrient Deficiency?

[rydin4life]

Does this look like a Phosphorus deficiency or need more CalMag?
I'm in 3 gallon fabric pots in Happy Frog soil under AutoCobs.
I watered yesterday with 5g MegaCrop, 1/4tsp Flower Fuel, 3ml CalMag to a gallon of water. Ph was 6.7 in and runoff was 6.2 so soil ph seems quite low. Should I just continue watering at a high ph close to 7 to bring levels up?

[Iammygod]

Soil ph doesn't change easily by adjusting water ph.