New Grower flushing problems ?

[lonewolf25]

howdy folks,
i have started flushing my baby 3 days ago was doing another 1L today and noticed that the run off was at 5.0 so i thought i had to bring that up so ended up doing another three 1l flushes to bring the run off to 5.8 but on top of this have noticed that leaf tips have gone kinda crispy like theyve been burnt.
what y'all think ?

 

[namvet25]

If your flushing I take it your about ready to harvest so I wouldn't worry about runoff ph.If some leaves are yellowing and drying that is normal and the plant is coming to its end.

 

[lonewolf25]

yes but not only that like leaves just easily being plucked off but also the tips have gone kinda burnt on some of the still green leaves but anywho i think remedied it and just have to keep a keener eye also are we feeding at a specific ph or do we have to calibrate the feeds so it makes the soil go in the good the range.
because ive been feeding around 5.8 - 6.5 so i was getting run offs at 5.8, is this a rare spike in soil ph ? wtf !? :S