I stopped using LK too.
I also have a gallon that has been sitting for a long time.
SG I asked because I noticed how clear your rez's are and there's no way they'd be with LK. Besides the Canna PK 13/14 are you using anything else? Don't mean to jack your thread buddy...
VP I was underfeeding, Followed your veg and they are thriving. I think it was because of the new blue lab pen. You are using the 700 scale right? I am at 1200-1300. Seems high but they like it. I am in RO and increased my calmag to come close to your readings. They blew up quick. Gonna dial them back down a weee bit. You aren't using any boosters are you? I have cut out silica blast, LK and Hydroguard but do add a bit of h202 here and there if the rez isn't clear.
LT