Mr Wizard makes another stab at it

[ReikoX]

There is a chart somewhere that shows pH and EC changes and what it means the plant is doing.

For example EC drops and pH rises, then the plant is taking more nutrients than water. EC rises and pH drops, the plant is taking more water than nutrients.

Your pH ramp sounds spot on from my research. I’ve never grown in DWC. Have done a couple F&D grows.

Edit: this post had that chart

Is this potassium deficiency?

I did noticed this too! When they entered in flower, with PH on 5.6 they begins looks with deficiences, and reading about it I did take the conclusion the PH was too low. One strange thing is, the PPM is getting higher and PH too, but the water is falling… I was following the chart bellow was one of the reasons what I let the ppm lower in range of 600 ~ 750. I will check the ppm and ph soon and update here… I guess it will rise slowly… until the end of day will be on ± 6.1. I need change de …