Heeellllppp!! using 20 litre Ikon oxypot however only using 13 litres of water (was told to do this), sensi grow 2 part nute, pk 13-14, big bud finished,(end of week 4) now in week 5 (+4 days) of flower. Was promised help and have been left to it 
, aint got a clue whats going on with these leaves! pH is sitting between 5.5 and 5.8. Not sure about ppm but definately not over 1000ppm. Have a look at pics.....please....need some feedback asap!!!
