Having trouble getting good tric pics again....I need to go back over and restudy what Rock told me about the camera

They're looking pretty done to me on this one plant. Rhiz....I took the number back to 600....by evening was up to 700....dilluted back down to 580 and this am at 598. Ph going up slowly....not really quick or abormally to me.

Should I continue to dilute back to a certain number (I chose 600 for no real reason) or should I let the number climb?