Yellow/white buds/tops since bloom started. Now in week 5.

Looks like P-K deficiencies...what nutes are you using? Soil or dwc? PH?

Red/purple water leaf stems indicate Phosphorus or P and the rusting edges on your fan leaves indicate potassium or K deficiency

Girl Scout Cookies (supposedly), 4 1000w vented lights, 4'x16' tent, 1;4 pearlite/soil, temp 77-82, humidity 50-55, co2 set for 1150ppm's, G.H. Floranova expert drain to waste regimen + calimagic currently at 850 ppm not ph adjusted, feed every 3days (when pots get light in weight). Some ph issues in veg. I was ph'n up to around 6.0 (drop/color tester) and went into lockout. Checked runoff ph and it was really green so I did some research and read that your not supposed to adjust ph in soil. Flushed and stopped adjusting ph problem solved. Now in bloom and the runoff ph is around 5.5. Should I adjust ph or not? Maybe the soil was trapping the ph up. Without adjusting ph, nute solution is acidic. Is ph even the prob? Iron? N? The yellow tops are buggin me out. Please help R.I.U.!

Thanks for the input Robert. What about the yellow tops? Could the deficiencies be due to ph?

Yes most definently associated with PH...the ideal to have soil at is 6.5-6.8 PH, the fluctuation also doesn't help. What PH is the water going in?

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Top one

Before nutes?

Im getting my new ph meter adjusted tomorrow. Im not having much confidence in the eyeball system.