Brown Spots between Veins--Help

[vtinca]

I have a variety of strains in 3 different mediums. All are experiencing the same problem which is brown spots between the leaf veins (see picture).

I use R/O water, and check PH before each watering. I use house and garden nutrients (coco and aqua flakes).

Any idea what could be causing this?

Detailed information below.

Outdoor Coco:
Bonticare Coco Coir
House and Garden Coco Line and supplements
Water every other day
PH 5.8

Outdoor Soil:
General Hydro expert line with supplements
PH 6.3
Water when needed

Indoor aeroflo2:
House and Garden aquaflakes and supplements (veg cycle [algen extract, magic green, root excelurator)
PH 5.8
No timer, running 24-7
H202 for first 3 days, then added root excelurator

 

[Seamaiden]

Oddly expressed, but looks to be a calcium deficiency to me.

 

[symbiote420]

I second that....a touch of Mg deficiency too!

 

[sedate]

Wow that is "oddly expressed" ..

 

[vtinca]

Thank you so much. I will supplement with cal mag and hopefully remedy the situation. That was what I originally thought, but the way it was "oddly Expressed" (great terminology BTW) threw me a bit. Thanks again!

 

[motherlode]

Oddly expressed, but looks to be a calcium deficiency to me.

+1

oddly expressed indeed

 

[vtinca]

Thank you all very much for your input!

 

[benign]

Strange...it almost looks like water droplets...do you foliar feed at all? Sort of looks like you may have cooked off some water droplets...although it is most likely Cal/MG issues as other posters have said.

 

[xrob415x]

Hey bro Use cal Mag. Get the water to about 150ppm with the cal mag before you add your nutes.