lowerleaves turning yellow..

hi all.

i have hydroponics system growin 3 plants.

all the sudden, 3 plants started to show lowerleaves turning yellow and they stopped growing. im very worried because i change water every week and add ewc every 3 days. all plants are a month old now.

can anyone tell me whats going on?

Would need to see the plant not just a leaf. But your in the wrong section for help.

thats not a nitrogen problem,imo its over fert or ph is way off

but buddy is right,a whole clear plant shot would make a diagnosis much easier...

michealiasenzyme said:

hi all.

i have hydroponics system growin 3 plants.

all the sudden, 3 plants started to show lowerleaves turning yellow and they stopped growing. im very worried because i change water every week and add ewc every 3 days. all plants are a month old now.

can anyone tell me whats going on?

Click to expand...

What is EWC? We also need a shot of the plant.

Here's what you need to post to get quality help on your grow.
(1) Give images under metal halide, cfl or incandescent (no hps).
(2) Give complete synopsis in one post telling us all the details. Now you will have a chance of getting meaningful support because most people here would like to help you. Unfortunately without this info all we are doing is guessing. If you decide to use the wrong guess you may end up potless.

(1) Give images under metal halide, cfl or incandescent (no hps).
(2) Give complete synopsis in one post telling us all the details.

Those lower leafs aren't getting any light and the plant is choosing to kill them off. Or nitrogen deficiency.

a ph of 8 is too high

I think she meant 5.7 to 5.8. I would say you're doing alright. I would get more penetrating light on them. Looks like you're using florescent lights, maybe get the lights closer or add some supplemental lighting.

thank yall for trying to help me..

i found out that there are root rot and fungus in every net pot.

how should i cure root rot in netpot?

since some root in netpot arent getting any beneficial bacteria from water but humid in the container, they are rotting. for now, i sprayed ewc in net pot.

this is very frustrating because there were stem rot before because net pot was directly contacting water.

h2o2,

michealiasenzyme said:

thank yall for trying to help me..

i found out that there are root rot and fungus in every net pot.

how should i cure root rot in netpot?

since some root in netpot arent getting any beneficial bacteria from water but humid in the container, they are rotting. for now, i sprayed ewc in net pot.

this is very frustrating because there were stem rot before because net pot was directly contacting water.

Click to expand...

Look up Pool Shock and cannabis. You'll be able to make some "DM Zone" for pennies on the dollar. I myself have not used this personally. but i've read many successes. Give it a google and try it out. I think it's about 3grams of Pool Shock to 1 Gallon of water. I think u can get it from Wal Mart a brand called HTTC Pool Shock or something like that. One of those packages makes about a years supply. and it's about 4-6 Bucks for a package. Apply every 3-5 days. 1 oz. per gallon of your concentrated 1 gallon. so if u mix up a gallon of pool shock solution. 1 oz per gallon of that to your res. if ur rez is 50 gallons, u'll use 50 oz. which is i think 150 ml of your solution.

jijiandfarmgang also tells you how to make it as well.
https://www.rollitup.org/t/how-to-operate-a-sterile-hydroponic-system.849475/

It does look like either not enough light penetration down to those leaves and/or a nitrogen def....and as far as the pythium or root rot goes - I don't believe h202 is a very good option for root rot for a few reasons.
A.) H202 dissolves back into the air within 24-36 hours or something along those lines
B.) It kills any and all living organisms it comes into contact with, including beneficials that line the outer layer of your root mass that help nutrient uptake and protect roots from nasties.
C.) I'm pretty sure too much h202 can harm roots, too an extent at least, but this info could be off.
I was using h202 when I caught root rot, applied more, just slowed it down, and finally I ready this page http://www.growweedeasy.com/root-rot I decided to begin using Hydroguard. Literally within 3 days of my first application, there was an explosion of pearly white roots out of the older infected ones, and even the brown ones became much less brown/infected looking. Now, there are likely a 1000 additives that has the same effect, such as Great White, maybe (MAYBE) SM-90, Voodoo Juice, etc etc....because when beneficials outnumber nasties like pythium, the pythium can't breed and multiply as easily if at all. Ever since I started adding Hydroguard to my RDWC I haven't had the first problem with it...anywho that's my .02, not saying I'm right or that I'm wrong, it's just my experience. Happy Growing and Happy Holidays, my friend!

*EDIT* I believe achieving a sterile root zone isn't nearly as effective as having a root zone full of beneficial microbes/enzymes when it comes to DWC/RDWC, but that's just MY opinion and is what has worked best for me...doesn't mean that it's the best method or better method at all.

michealiasenzyme said:

thank yall for trying to help me..

i found out that there are root rot and fungus in every net pot.

how should i cure root rot in netpot?

since some root in netpot arent getting any beneficial bacteria from water but humid in the container, they are rotting. for now, i sprayed ewc in net pot.

this is very frustrating because there were stem rot before because net pot was directly contacting water.

Click to expand...

Go with plain old Sodium Hypochlorite (Bleach). Next until you figure out what you're doing run a sterile reservoir. There is no substrate to hold bacteria at the roots. So play with all that later. Right now you want to get a plant to harvest.

When I was in NFT I used our tap water and then would top up with plain tap water. So that kept my chlorine at a decent level often enough. Find out if your local water authority uses chlorine or chloramine. If it's chlorine just use that (as long as your PPM is around 200 or less). Finally keep your pH below 6.3 and your reservoir temp below 70 (that is very important).
hth,
Annie