So this morning I dumped everything and mixed up a whole new batch. Some of the old stuff coming out seemed to have a slight "algae" type smell by which I was NOT amused. Ph was up around 6.5-7. The roots are only now beginning to come thru the bottom of the farms and there are a few that look brownish and nasty.....others seem fine.... Checked ph this evening and again way up....started at 5.9 and some were above 7 in about 12 hours. The ones closest to the res seemed to have the least change to them and adjusted down with much less ph down than others.....some took 8mls or so of ph down to adjust....but at least they stayed there finally which was something I couldn't get them to do last night.....think I'll dump everything again in the a.m. and start fresh......oh did add a small amount of H202 to each w/f because of the smell......worries me.