On the second day of this week, I filled the reservoir again. This time I have an RO filter available to deal with the tap water (EC 0.8mS). I mixed 10l of RO and 10l of tap, which netted a pH of 7 and an EC of just below 0.4. But of course I had to add more CalMag to make up for the filtered calcium. Even after adding all nutrients, the EC was still just shy of 1.5mS which surprised me a little, I was expecting to land closer to 1.7mS, so I am going to increase it a bit next time, probably to around 1.9mS. The plants are in stretch, and they are indeed stretching quite a bit. NYC and SAD are the tallest right now, although the BJ has been catching up a bit recently. They are between around 45cm and 58cm tall, so overall not too much of a difference, which is also good, but I need to keep an eye on it as I would like to keep them below 70cm. I have no plans to put a net in place at the moment, but this depends on the growth of the next week. All of the plants have been showing preflowers around day 7-9 of flower. No signs of pollen sacs so far. Aside from one calcium-deficiency-lookalike type of leaf issue, which I suspect is something else, ther are no issues whatsoever, which makes me happy.