Is it just me, but do we chase def issues or do we just wait till they happen and freak out. I'm gonna give my girls a good flush every now and then. 1/2 strength of the nutrient solution and three times the container amount of pH'd water. It seems to refresh the system and they seem to like it. We all know what pH goes in and what comes out. We all know the proper pH for our medium and still get wacked by some issue. It's really the only way to get your girls back to normal. We are reluctant to do a flush until there may be an issue. Flush the roots with fresh nutrients and see.
Flushing is to me, recently anyway is Chicken Soup for Cannabis.