Problems with my foliage!

i know ive seen this problem on here before - but all the searches ive done have just brought up pictures similar to mine and no definate answers as to whats causing it! seems people have tried something that has been suggested in the thread - its worked and they havnt bothered posting what it was that actually fixed it!!!

Any way - as per usual, a run down of my set up - and then the pics!

4 pot re-circulating bubbler system
x2 200w 6400k CFL's
27 celsius
36% humidity
24/0 lighting schedule
canna aqua vega nutes 500ppm
ph is a steady 5.7
extract and desk fan on 24/7

I was running Co2, but my bottle ran out and havnt been able to refill it yet - pretty sure thats not the issue. i made sure i lowered the temps, and it ran out early last week and this has only appeared the last couple of days

I completely cleaned out my system on sunday, and all was well - the plants seemed to like the fresh lot of water!

Im leaning towards a magnesium deficiency, on the basis ive seen it mentioned on a couple of threads i found on my search - but the only suggested fix for this that i have found is epsom salts. can i put them in my hydro system? will it cause any blockages?

This is my first grow - i have already managed to fuck up more times than ive seen anyone on here! thought id got over that stage!

Please help, they have come so far



This is a leaf from my least affected plant - the three smaller ones are affected more the smaller they get (doea that make sense?) basically the smaller the plant the more affected it is.


Thanks in advance!

looks to me over feeding.
what are you feeding and when.
i did this on my 1st grow, when i was feeding every day.
and after 6 weeks of 12/12 of feeding everyday, my plants built uo food under the fan leaves and stalk.
i would flush or even repot, and cut down on the nutes.
any full plant pics.

also do you use a fan?.

after reading your thread more, it seems like your still in vegg.
i dont feed for the 1st 3 to 4 weeks, then only 1 day a week.

but are you feeding vegg food during vegg or flowering food?.
what food are you using for vegg.
what ever your doing cut it down to half, and the plants might come back.
still would like to see a pick your plants and maybe a pic of the set up too.

Yeah man, click on my grow journal link in my signiture, and all the pics are in there.

Im running a recirculating hydroponic system, so technically im feeding all the time!
If i think about it, when i added the nutes in after refilling the system (just over 100litres of water!) i did add more than i did the last time - but that time it was only 1/4 strength - so i could only have reached 1/2 strength this time at most.

Im running a fan on them 24/7 they all sway happily in the breeze!

EDIT:

Forgot - im using canna aqua vega nutrients, and yes im in veg - about week 5 now
i wanna go into flower next week but dont want to do it untill this is sorted!

Anyone???????????

Grow Marijuana FAQ, Cannabis cultivation - marijuana growing tips & photos
the basic problem chart with pics. see if this helps

Wow! cant believe i hadnt found that before - what a usefull little page of info!

from that it looks like i have an Mg deficiency - 3/4 tablespoons of epsom salts in my resevoir should fix that - oh, and maybe a good flush of my system before hand too!

Ill make sure i post after ive done it to let everyone know if its worked!

Looking forward to finding out your resolve.
Please let us know.