I checked the trichomes w. ~70X for the first time at the end of week 7 and they were clear. I checked again on the following day (day 51) and they had started turning milky so, I flushed with (with regular pH-ed water) until runoff was reading ≤150 ppm. I'm a little worried I'm late on the draw with flushing, but I'm seeing very few amber trichomes at this point. They are getting chunkier by the day! Let's hope I flushed well enough.. home stretch.