if the plant isnt performing like you want id check your ph meter as this is a dead giveaway if something is a miss, 2.8 is a bit over the top but if ph and ec is rising this is a sign she wants less feed
drop her back to 2.4 if she is taking in more water than she is nutrients then its a sign your out of range with ph or your over feeding, last thing you wanna do is mess up at this stage of the grow (no pressure)
you want to keep her feeding healthy and happy untill the pk week and then you can hit her hard because the week after you lower her base nutrients anyway so she gets plenty of time to recover
their is no mention of what ph your on but id aim for 5.9, if she is pulling from her reserves and taking on more water something is a miss in the res just my opinion though
looks like the topping paid off (sound advice)
seymour