Brown/dark patches on large leaves... deficiency?

Hey guys, my clones are about 1 month old, and about 1 foot tall, they got patches and discoloration on the larger leaves...

Some of them have brown spots... Most of the plant looks great! using home made aeroponics (which worked great for other grows)

What couuld this be? a deficiency?

pH: 5.7
temps: 77* Humidity 55%
Water temps: 25C
usuing botanicare nutes, (sweet and grow) at 900PPM (using tap water which is 350PPM so,,600PPM of nutes... should i add more??? )
also few drops of super thrive


** HERE ARE THE PICTURES!! **

pics pleez.

kk ill get some pictures in a few mins!

Pics up!! help please!!

BUMP!!!!!up

the brown spots look like Mg, but I can't comment on your nutes as I haven't any hydro experience.

too much Mg? or to little?

I have the same prob, not sure what is is tho

water is alittle warm at 80f (26.6c) i got root rot and the lower leafs got brown spots beside the roots have a brown slime. Chiller should be here today sometime manual controling it sucks, beside iam not very good at it (changing the frozen ice pack straped to the outside on the res). So how do the roots look?

if its a mg deficiency then I think epsom salt is supposed to help that, maybe some sort of lockout caused by the tapwater, RO water might help

yeah find loudblunts. he's that hydro guy. i'm soil.

Hmmm, my roots look very good.. my water temp is actually really good 24-25C ( I got a fan cooling the water, no light leak to roots)

As for tap, i think my tap water does suck...im getting it from the garden hose....

Anyone else?

help!!

This problem is getting worse, i noticed it is ONLY happening to my large fan leaves....


What can be the problem!?

Did you try increasing the nute strength? That really looks like a Mg def to me. I don't know if it's standard to add epsom salt to aero nutes, or I'd suggest that.

get some cal/mag

I got some botanicare sweet

Botanicare Sweet Berry


This stuff,, it has epsom salt in it...

I add 50 ML of botanicare Grow formula.. and 25 ML of sweet.. in 12 galons of water..

I have about 1200 PPM in the water (350 of it is from TAP crap) so.. 850PPm of nutes.