Looks like you are in hydro and it looks like you are nearing the end of flower so I wouldn't worry about it too much. Could be PH, could be nutes, lots of other things. I would say those will finish with no issues really.
looks like nute burn or ph just being out of range.
How much ec have you been feeding?
What ph have you been feeding at?
what nutes have you running?
As long as it's getting all it needs it will be fine and won't show any problems until it starts to finish itself off.
Looks like you are in hydro and it looks like you are nearing the end of flower so I wouldn't worry about it too much. Could be PH, could be nutes, lots of other things. I would say those will finish with no issues really.
