Day 50 - Double flushed, used about 2.5-3gal RO, PH was around 6.5(ish). Measured PH after, coming out to around 6.5-6.8 and around 1080 PPM.
Day 51 - Just monitoring tent environment (Temp, RH, VPD, etc), planning on waiting till she asks for more water and, I plan on using Epsom salt (1tbs per gallon) next time.
Day 52 - 55: Just monitoring tent environment (Temp, RH, VPD, etc), not much to report.