Please help me with my plant i dont know why my leafes are turning yellow

[MacGyverStoner]

Check out this link here:

Booster Nutrient EC/TDS

One question regarding the marijuana booster i purchased Checking the EC when making food solution 1mill=0.4, I am not sure if this is correct as it is well below the feeding schedule. My EC/TDS meter is calibrated correctly the base water is tap water settled at room temp for 24hrs is EC=0.1 Ph of solution is 6.3 after adding Ph adjuster Can you confirm if this is correct or can i add more food to increase EC? many thanks Steve

It has links to details about the booster schedule and various info on using the booster.

~MacG