Red trichomes from Advanced Nutrients flasless finish?

Hey mate! First off, awesome looking bud! The quick and short answer to your question is; No. The colour you are seeing is not your nutrients being diluted into the trichromes. The most likely scenario is that your temps have dropped slightly during the flowering phase, which in turn causes the plant to produce less chlorophyl (what gives the plants their green colour). Since there's less of this green pigment, you may start to notice other less-dominant pigments within the plant, in this case it seems like anthocyanins! "Anthocyanins are naturally produced pigments that give flowers their red, purple, and blue color." Basically, in the same way that "purple" strains exhibit purple hues in flowering, your plant just happened to have the genetics that display red within the trichromes (by having higher levels of anthocyanins). Hope this helped!