New Pics Please Help

Hey everybody i have a few plants 2-3 months old, turning color and some curling.. someone told me it was nute burn.. so i flushed it.. discoloring has since then slowed, but i think my ph is high... temp is 68-70, low humity, using cfl's.. stems are sturdy and thick.. what do u think i should do? sorry if the pics are shitty

yeah does look like nute burn but look like she recovered-last pic-do urself a favor and add a layer of fine dolomite lime to the top layer of the soil-it will help buffer your ph and provide some extra mg and ca.
how often r u watering?

thanks for the info..well i read u should let the soil go down to about 3 on a meter before watering so about once a week.. but i did just flush the plants like i was told to.. but before that i didnt know better and was spraying my plants w/ food and water (in light), so i stopped that, i dont spray at all w/ food anymore, and rarely spray w/ just water overnight after the flush it the discolorationa and curling seemed to slow down and ph went down but now the meter says its up again.. so i dunno what to dooo?.. flush again w/ low ph water? or do what u said about dolomite... my plants seem strong but the tips are turing and a few leaves are dying all together, all at the bottom but still, the discolored tips are spreading.. i just dont want to screw them up any more than they are.. thanks!

back off the nutes a bit and add the lime