not much to report today although last night the pH dropped again from 5.5 to 5.3. I thought It would level out around 5.5 but it continued to drop so I added some pH up to bring it back up to 5.9. Rez change tommorow......switching to 12/12. I think I will use a slightly weaker nute nute mix to see what the pH does. Target TDS with supplements....1500