You do like your Liquid Karma don't you? I probably would cut it back somewhat (maybe half) and see if that helps. Maybe your total number is too high for them.
And it wouldn't hurt to have a ppm tester......that way you could check and see what exactly is "too high" for them and you can go by that somewhat in the future. I'm discovering that different strains can really like some different ppms than each other now that I've been trying some new types.

Hope that helps. Keep us informed.