Then your ph is off .....or there somthing in the water causing the water to sterlized....dump water out rise with hot water .. dry out mix new batch of water add nuts run for a hour 2 check ph and ppms if alls well add clones
Ph is pretty stable at this point at ~5.8. Every few days it rises a bit and I PH-down it. PPM's are about 70.
If I dump my reservoir, what to-do with the clones that are in there? How do I keep them from dieing during this change out?