Plant leaves losing color

I have 3 plants I fertilized c99#1 and Gdp with General Hydroponics floramicro, florabloom and calmag. I fertilize c99#2 with foxfarm’s big bloom, wholly mackerel, kelp and calmag. C99#1 and gdp and showing signs of losing color. C99#2 is looking good and thriving. I’m wondering is it the General Hydroponics that I used mixed in with the Foxfarm soil. It shouldn’t be a nitrogen Deficiency because they didn’t look like that prior to me fertilizing. Does anybody have any idea?