Deficiency or toxicity causing this?

Hey there I have these browning edges and stripes through a lot of my leaves.. It is high and low on the plants.

Humidity
-55-65%

Temperature
-15-26c (lights on/off I aim for those,sometimes a little outside them)

Medium
-coco

EC
-1.7-2.0

Lighting

-3x600W hps

Fans/ventilation

-All perfect

Tent

2mx2mx2m

Nutrients

-Floramax

-A&B
-Organa Bud
-flower enhancer
-resin xs
-cal mag

Feeding 3l every second day with run off, at this point they are still damp and only a touch dry on top. Get perfect run off each time with another 3l each time. Does anyone know if this is a toxicity or deficiency and of what? I know they have a nitrogen toxicity due to those deep green leaves.. I’ve pulled back on what they recommend on the bottle with the A&B.. have no pests at all. Any other questions let me know.. I’m also supplementing lighting under canopy with 2x 150w LEDs, flowering spectrum. Week 5 flower i believe

Coco medium should be fed everyday, at least once. Never left to dry out at all. You'll eventually buildup salts (and get hydrophobic) leading to toxicities, and lockout from accessing certain nutrients.

The only data you left out was your PH levels, which are probably not very stable with your every other day feeding cycle, and especially letting it dry. You should lower the EC for sure, and hit them once a day from now on. Maybe check runoff, and flush if needed.

Pic 3 is odd, with the stripes like that. Must be from the side lighting? The rest looks like PH issues, which can pretty much resemble anything..

Drop That Sound said:

Coco medium should be fed everyday, at least once. Never left to dry out at all. You'll eventually buildup salts (and get hydrophobic) leading to toxicities, and lockout from accessing certain nutrients.

The only data you left out was your PH levels, which are probably not very stable with your every other day feeding cycle, and especially letting it dry. You should lower the EC for sure, and hit them once a day from now on. Maybe check runoff, and flush if needed.

Pic 3 is odd, with the stripes like that. Must be from the side lighting? The rest looks like PH issues, which can pretty much resemble anything..

Click to expand...

when I say dry out a little on top, they aren’t dry by any means the only did grouping is starting to brown off but the whole pot is heavy and wet/damp.
I will start to feed daily, I’ve been meaning to for awhile but it’s such a task trying to manage it with life ha.

res PH is always set to 5.8. Will watering daily stop the ph fluctuations within the pot? It’s the first time I’ve had such fluctuations with this set up and what I do..


nah that 3rd photo is browned in that manner.. it’s real strange. Will try water daily and hopefully stop the ph movement. Apart from the leaf they look healthy as..