Got a plant on flower 4 and half weeks in and I've noticed a few of the fan leaves have got tip burn or perhaps a deficiency and the ends of the leafs are bending upwards and are breaking off if I touch them,
600w light was 16 inches to tops but moved it higher to 20 inches today
My water is soft water so adding 0.4 cal mag then canna ab to make my overall ec up to 1.3
pH is 5.8 to 6.1
5 inch extraction fan and oscillation fan blowing on tops
Feeding twice a day to plenty of run off
Run off ec is 1.6 and pH is 6.2