in need of diagnosis ASAP!!!!leaf edges turning brown!!!

[fatburt]

so i am growing undetr 2 k,one mh and one hps.....im growing in 100% perlite using gh flora series,and ran out and last 3 feedings have been with miracle grow 15-30-15....but the deficiency came while using gh nutes,but its progressing pretty bad at this point.

temps at night are pretty low,like close to 50 drgrees till i can bring them inside in 2 days....here are some pics...im guessing magnesium or zinc?but im guessing

 

[Scottish Research]

Stop using Miracle Grow in passive hydroponics.



R.Fortune

 

[fatburt]

its not the miracle grow...can someone please just give me a solid answer.....im really stuck....i have used miracle grow in the past with no problems......im going back to gh this week,just ran out of $ for a bit....gotta do what ya gotta do.....

anyone have any solid suggestions?

 

[wantaknow]

its best to flush ,the rez give the plants ph clear water ,and remix again trim off the tips and start over ,it looks like a few things are going wrong,i would use an ancient earth asap

 

[Granger2]

Go here and look at the pics. Good luck. -granger
https://www.icmag.com/ic/showthread.php?t=231387

 

[RonSmooth]

How do you know it is a deficiency?

Is it heat stress? Are the bottom leaves affected as well?

 

[Sat X RB]

it's not a deficiency. it's a reaction to nutes. shouldn't mix nutes. if it began with gf was the gf old?

no one's perfect but Robert Fortune almost is!

BIG flush. feed with new gf nutes.

 

[fatburt]

im moving in my house tomorrow....i just got my furnace put in......ill flush and refeed and see what happens...thanx guys