Well I like the number on your base nutes.....I use 700 (50/50 Pro Bloom/Hydroplex)
and then 300CalMag to 1000. As I said when I tried to raise the number of the bloom nutes above that I started to have some real problems. I've heard various numbers about the LK and Sweet....the two best hydro minds I know are my hydro guy and Rhizome. Between those two guys (and the ppms) I've worked what I think works best for me with the LK and Sweet getting the optimum of each without wasting any that the plants arent going to use anyway. I go with 7ml/gallon of each...no more of either. I KNOW the number can go much higher...but imo most it is being wasted after that. AND adding useless ppms also so that's my limit with those. Put ALL those together and you are very close to my top ppm # of 1500....(i like some breathing room) with my nutes.

Its very hard to say about them not eating....do you have too many extras in your water that are just taking up space perhaps?.....and I still think you need some CalMAg. And of course different strains will do better (or worse) with the changes in ppms. My first grow (bagseed) I went WAY high with the numbers not knowing any better. The plants did TERRIFIC. The next time I tried taking the numbers that high the plants crashed (different strain) so who knows?