are u ph'ing nutes after mixing them? might sound like a silly question but ive heard of people ph'ing water then adding nutes.
I would use at least 3ml/litre of canna a=b and 1ml big bud.
Its normal for run off to be less if the plant is feeding, this is also likely the cause of the difference in ph. As long as plants look healthy its no problem at all.
Just an after thought. Are u aware that there are diff types ph down? U want to use nitric acid in veg and phosphoric acid in flower.
I would use at least 3ml/litre of canna a=b and 1ml big bud.
Its normal for run off to be less if the plant is feeding, this is also likely the cause of the difference in ph. As long as plants look healthy its no problem at all.
Just an after thought. Are u aware that there are diff types ph down? U want to use nitric acid in veg and phosphoric acid in flower.