Gave the girls their first feeding after brewing the nutrients for about 48 hours. There was scum at the surface of the solution, so I know there was microbial activity going on. Given how dark they turned the following 36 hours, I probably won't need to feed again until sometime around the second week of bloom.
They continue to look great. Most of the larger, older leaves began yellowing/crisping, so I plucked them off. The girls are going to need a good pickdown when bloom time comes, and they seem all too ready for it!