I usually yellow pH meter that was in video did not care for the quality of it after 2 months and have purchased a newer one and had not recalibrated it in over a week now I were calibrate it every week
They take water every 3days, and just ca mg water every other watering.
Is this to lite of feed then.
I don't know if you're familiar with the general organic line,
I use 1 tbsp (=6ml) of the bio Marina
1 tbsp bio thrive bloom
1tsp bio bud
Ro water
General organics with ca mg
Inner leaves yellow and dropping
Pale yellow leading to all yellow
Start at bottom going up and out
Affected larger fans first