Leaves brown up in EVERY one of my runs?

*left side: lemon pie
*right side smaller: Zkittlez, both by 420 fastbuds>
Indoors a
2x2x4 mars hydro tent.
*3 usb fans,
(mainly all focused on plants)
*12V (uk) 9" fan (focused on air movement)
*A small humidifier and homemade Co2, (yeast n sugar).


*Medium:
Soil, Bio-Bizz Light Mix Soil.


*Base nutes:
All 3 bio-bizz, fish shit, bloom $ top max.
*Extras* bio Heaven, bio bizz cal-mag, a
lso VitaLink PK 13/14. (At appropriate time)


Lemon pie is in a 16L / 4 Gal fabric pot.


*Lights:
GrowStar 1000w full spec, plus a bloom plus 2000w full spec (on the left)

Have left out calmag for a while now since our wayer is "hard" n full of calcium as is!
Also stopped using the bio heaven.

Why the brown n crispy leaves tho, this is about the 3rd thread iv done about this as its got me stumped, n my plants stunted!

Using Bluemat carrot as extra feed n give proper soaking through once/2wice a week at moment, the lemon pie is in 8th wk n only jus showing pistols, both autos btw.

Any help appreciated.

 

[Mañ'O'Green]

I see a lot of salt build up on the outside of the pot? What exactly is your feed amount and schedule?

 

[2budz]

Your lights are way too high, for starters. Move 'em closer. Those brown leaves, did they ever sit in the soil when the plant was smaller? In wet soil? @Mañ'O'Green asked what your feed schedule/amount is. That would tell us a lot.

 

[2budz]

I would remove those really brown leaves at the bottom. Feed a little less. Not water less, just less nutes. AND MOVE THE LIGHTS CLOSER.

 

[MrAutoGrower]

Salt build up. You’re over feeding. In soil, feed twice a week, and then ph water when the pots are light

 

[Luketheduke]

To check for over feeding, look at the recommended ppm for flowering stage. Then do a slurry test on your soil and see what the ppm of the soil is. If it's higher than recommended it's too much feed.

If it's lower than recommended it's not enough.