ph fluctuation

I have switched from Humboldt Natural Grow to the Lucas Formula after completing a flush. My plants were showing cal, mag, zinc and iron deficiencies. How long will it be before they resume full and vigorous growth.

Here is my situation. Grow Medium: Hydroton System: Waterfarm Buckets Nutrients: Humboldt Natural Grow and Bloom Water: Tap (190 ppm) Lights: 1000 watt dual arc, 1000 watt daylight (Large A Wings with super spreaders) Temp/Humidity: 65/76, 20-35% Strains: 3 Affgoo and 3 Skunk #1 So...