There's really no rule as to how much to water on a given day, every strain and individual plant is different. Some of these growers are great with the heave ho method, me I suck at it, I just use a meter like you. But I would take my measurement with the meter in further, not so far out on the edge.My pots are real lite....its over water and it started when I gave 1.5 liters a day I read this online 1.5L for flower and 1L for veg....well I'm going back to my hefting methods I got that down pretty good.....