It is normal to expect some nitrogen deficiency at this stage of the grow. Regular top offs with PH balanced water only will flush the salt crystals.
byrdog55 Reviewed by byrdog55 on . Deficiency -Hydro Grows- What is your experience level? (first timer, novice, experienced...) first timer What type of hydro set-up are you running? 6inx6in grodan rockwool cubes on 3ftx6ft trays 400gph activeaqua pump with 1/4 black tubing feed lines(2line each cube) Your Equipment: A) Type and wattage of lights. (MH, HPS, CFL's, tube fluorescents, LED's) Rating: 5