Dont know what to do. I ve been told to USE clean water, When Im changing the nutes. Do I just add a gallon to the resivor(assuming that im taking an equivalent amount out) and then run it for a couple of hours. Or add 5 gallons of clean water and florakeen for a couple of hours, then change it out with 5 gallons of ph, ppm,h2o2 balanced mix. the ladies are about 1 week in 5 gallon DWC system pureblen pro 3-1.5-4 nutes around 500ppm and a 5.0-5.5 ph cause they seem to strech at that ph.?