yellowing of lower leaves and sprading up helppp

HELPPP please...

i had 2 bluecheese and 4 shaman and 2 churches and they are ALL dead, except this bluecheese which is on the way.

I really cant figure out what is wrong with them .

a week or so ago it was fine n all and now its half dead.

im growing in 1cm RC cubes under a 250 metal halide, air circulation is good and temp is between 22-24c.

A+B iconic @ 1/2 strength,
oxy-plus - 10ml/day {tank is 20L}
nytrozyme - {as directed on the bottle}
gurdian angel - {as directed on the bottle}
superthrive - {couple of drops in tank}
canna trichoderma. foiler feed 2-3 times per week

the rest of the plants died befor i started adding nytrozyme, guardian angel, superthrive, and trichoderma to the tank so i guess they have nuthing to do with it.

this bluecheese was the youngest one of the lot as i added it round 2 weeks later than the others and it was holding up. till a couple of days ago.

i strated off flooding 1x a day, moved up to 2x and now i have dropped it down to once a day.
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lower {older i think} leaves start to yellow from outside and work their way all over, and it happens rappidly over a couple of days, then the ones above them start to do the same and now i can see that even the top are starting to yellow on the edges tho its very slight.
the plant has not grown at all for about a week, since the lower ones started yellowing.


the yellowing is really bad on the lower ones.
stems are dark purple which i think is just normal.
i have already removed 2 lower leaves as they just got tooo yellow and they were the biggest leaves on the whole thing.


i have no idea what to do please help.
iv flushed it today with superthrive/guardian angel and about 1/3 strength nutes to see what happes.

any suggestions or ideas please, need help fast.

What is the ph? looks like nut lock out. How are you mixing your nuts, always mix in water before adding it to the mix, never add together first. What are you using for a medium

matt7835706 said:

What is the ph? looks like nut lock out. How are you mixing your nuts, always mix in water before adding it to the mix, never add together first. What are you using for a medium

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ph is round 5.6 - 6.0 always, the mix is done A then water till half full, then mix, then b then fill up rest of tank and mix again.
1cm rockwool cubes.

I use a different system with rockwool and i water with a pump for 20 min every hour 24/7, your roots could be getting to dry. plants react way faster in rockwool then soil. i can tell you how to set up a real easy to use system step buy step if for like 80-150 buck if u want? all the parts are from home depot. Same as mine. have a look. i think its fool proof easy to use low maintanance

matt7835706 said:

I use a different system with rockwool and i water with a pump for 20 min every hour 24/7, your roots could be getting to dry. plants react way faster in rockwool then soil. i can tell you how to set up a real easy to use system step buy step if for like 80-150 buck if u want? all the parts are from home depot. Same as mine. have a look. i think its fool proof easy to use low maintanance

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Dude i just read your other thread. START WATERING!

RIGHT NOW!

matt7835706 said:

I use a different system with rockwool and i water with a pump for 20 min every hour 24/7, your roots could be getting to dry. plants react way faster in rockwool then soil. i can tell you how to set up a real easy to use system step buy step if for like 80-150 buck if u want? all the parts are from home depot. Same as mine. have a look. i think its fool proof easy to use low maintanance

Click to expand...

nice looking system, im 100% sure that roots arnt getting too dry, as the pots stay real heavy and wet most of the time if not all, and befor that i had the others in an nft setup and they were run a couple of times a day and the rockwool was always damp to the point alge started growing on the top.
after they started dieing that was the only one on the side of the system that was in a pot alone, n they all had the same problem at nearly the same stage of growth, thats when i took the nft system out and, just left this one . and i just added a couple of new ones 2 days ago n thats the last of my seeds.
any ideas?

what other thread???
watering? i swear part of the problem could be over watering.?

dickdasterdly666 said:

what other thread???
watering? i swear part of the problem could be over watering.?

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send me pics of your setup. I ve never usexd nft (nutrient film tecH). but i am going to and i know you need the misters running 1 min on 5 off. i use potclay on top of my rockwool to stop the alge growth, are you pumping air into you res? just saying but three hours with out watering is to long in my opinion. like i said i water through a drip spear 20 mins on 1 hour of 24/7 with 5.5-5.8 ph and my pots are always heavy with water in the rockwool always. how are you pots draining? are they net pots? i need to see the system.

matt7835706 said:

send me pics of your setup. I ve never usexd nft (nutrient film tecH). but i am going to and i know you need the misters running 1 min on 5 off. i use potclay on top of my rockwool to stop the alge growth, are you pumping air into you res? just saying but three hours with out watering is to long in my opinion. like i said i water through a drip spear 20 mins on 1 hour of 24/7 with 5.5-5.8 ph and my pots are always heavy with water in the rockwool always. how are you pots draining? are they net pots? i need to see the system.

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gimmi a couple of mins and ill get sum pics n info up.
thanks for the help btw.

basically,
the first pic are of the old nft system that i got rid of,
if u can see the plants were all in good shape b4 shit hit the fan, the one in the corner in the pot is the only one left and dieing now.

the other pics are of the situation now,
after i took the nft system out, i placed the tray under the pots and moved the tank outside and im using it as a flood and drain by hand, i dip the pot 80% in for about 2-4 mins by hand, take them out, place them in that lil plastic bit just to drain out the excess and then place them back.

i just uped the nute strength to 1.84ms as i think it might be a nitrogen def. as the nut strength was round 0.8 a couple of days ago, n then after flushing today in the mornin with 1.2 nute strength i didnt see much change so i thought wt the hell.

mornin is here and she is good as dead i guess.
im 99% sure that its nitrogen def. tho i dunno wt to do and iv tried everything and nothing works .

got a good supply of fresh air?

paddy510 said:

got a good supply of fresh air?

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yea man the air is banging in there, its changin thru all the time, they funny thing is that they grow sooo great at first all health and so speedy, then the same shit happens and in a matter of a week they fuck up n die . im pissed off. could it be that iv had the seeds for more than a year long? tho i mean surely not, as i have different strains from different companys n they all did the same thing at around the same stage of growth.

If i were you I'd put some daylight cfl's on it and see what happens.

str8balln said:

If i were you I'd put some daylight cfl's on it and see what happens.

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i dont thkink its got anything to do with lighting, im pretty sure its nitrogen def, but not sure how to cure or prevent it in the future.

that 250 mh is a banger for vegging.
and anywayz its almost dead, so im not sure anything is gona help it anymore.

i just wanna know how to prevent it happenin to the otherones that i put in a couple of days ago, cuz otherwise ill just drop dead, and would have gone thru 28 seeds and they all died the same way

All I can ask is are you sure your measuring out your nutrients correctly? Too little or too much could do this damage. Triple check before you write it off as being correct. I have made this mistake a few times.

snyder007 said:

All I can ask is are you sure your measuring out your nutrients correctly? Too little or too much could do this damage. Triple check before you write it off as being correct. I have made this mistake a few times.

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yea, i make sure that i measure the nuts properly, ok the might be like a drop of 2 off, but not like 4ml of a and 8 of b.

.
if its too little nutes it still shouldnt kill all of them.

i was told it might be OutGassing/offgassing.

i had the inside lined with very old white plasticy reflective material {possibly some of that pvc shit}. and i just cleaned it with soap/disinfectant and at some point {toilet cleaner} and i chucked it in.
iv taken it out now anyway just incase as im getting paranoid. now there are only light white walls.
and iv droped the lights a lil as its not hot in there n the air circulation is pretty good.