Gorilla glue #4

Hi all there coming along nicely seem to of bounced back a bit since flush and lower feed nitrogen toxicity seems has not got any worse they seem to slowed right down in stretch also and plenty of bud sites forming. pistils seem to be really exploading now I'm feeding 1.3ec never been so low but showing signs of a bit of tip burn so don't want to push them with feed maybe it's the strain I don't know? other strains even autos I have grown have been around 1.8ec at this stage I also pinched few more fan leafs off covering bud sites I've started Dutch pro expload today also my night time temp dropped last night so I will turn down exhaust fan slightly to bring less cold air exchange in the grow tent I do plan in late flower to drop temps