Definatly nute lock, flush them asap. with low ph water, test water before applying to plants should be around a ph of 5.0 if not your going to need to add very a small amount of ph down (follow directions on bottel and are available at most good garden stores). Once the water is in range apply to your plants. Once your ph is back in range in your growing medium (test your growing medium before and after flushing) then start nutes again.

very nice plants by the way.