I don't think so....my tips turned brown too on my (only) clones.
Weedhound Reviewed by Weedhound on . Deficiency/Toxicity symptoms in hydro plants, help Literally, no. -DWC -T5 Flo -70-77* F -34-44% RH -Apprx 5th week in veg. -Fox Farm 3 Part w/ LK and CM+(alternating at res change) apprx. 10ml per 1.5 gallons / 3-5 ml CM+ and LK -Distilled water Rating: 5