help hydo plants leaves yellowing

hi i just made my own hydro setup and i put 7 plants in it all are about a month old. i started the system last thursday and they have been drrpy since i transfered them but now they are yellowing please help.

strain: TRAINWRECK
Nutes: Quarter strenghth orchid nutes 20-20-20
ph: roughly 6.4

Either it is overwatering or overfertilization. Do you know what the TDS of your solution is? At the size the plants are at now, you should only be at around 500 or so ppm. What medium are you using? The roots may be drowning due to lack of air. Also, your PH should be around 5.6 in hydro, although I don't think that is your problem, but I would correct it to eliminate that possibility.

im not sure what tds is, i have 1 inch of the roots above water and there is plenty of air going through the water.

what is your temp, humidity, ph, and what light system do you have?

temp is low 70's and ph is 6.4 i dont know about humidity and im using a 400 watt mh with cool tube. all of this is in a grow tent in a closet

TDS = Total dissolved solids/salts

You will defnitely need a TDS meter when growing in hydro. I assume by your setup you're using the DWC method with the roots dangling just above the water line. How do the roots look? White and fuzzy or are they turning brown/slimey? If they are turning brown and/or slimey, that would indicate root rot. If they aren't then overwatering is not the issue. In any event, you'll need at least a basic TDS meter to verify how concentrated your nutrient solution is, without this, you're growing blind so to speak.

well the roots are a brownish tint but just the roots that were in the soil, the new roots are white. I will definatly get a tds meter.

it is a dwc but the roots are in the water with a 1 inch gap between water and top of lip

this is the one that i have and it seems to be working just fine.... and its less then 20 bucks including shipping it

http://www.eseasongear.com/ppmmeter.html

stupidlizard said:

well the roots are a brownish tint but just the roots that were in the soil, the new roots are white. I will definatly get a tds meter.

Click to expand...

are you using a air pump and air stones? What type of water are you using.... tap water... filtered water.. store bought water.... distilled water

ok thankyou i just ordered it

i am using an air pump with bubble wand here is link to my journal https://www.rollitup.org/grow-journals/164958-homade-hydro-grow.html

could just be a lack of air to thwe leaves, get some air circulating in the room

what is that grow medium that you are using?

check this out man

https://www.rollitup.org/marijuana-plant-problems/157345-have-plant-problem-check-here.html

it is just pieces of cut up foam til my hydroton comes

make sure no light is penetrating that tub or you will have algae growing all over the place

tub is lightproof except for the water level strip but i can cover that easily enough. plants are still droopy and i still have this clear gel growing on the roots. What is that?

that is probably root rot which should turn into a brown snot or slime...I dont know this for sure so get some more opinions but if this is "Root Rot" then this is what you need to get.... ide get it at your local hydro shop if possible
Hygrozyme ------> http://www.htgsupply.com/nutrients.asp?categoryID=2&subcategoryID=130

well i got the tds meter and it reads 512

GOOD DEAL!!! The ppm should be a little higher depending on which stage you are in... let me read over this thread again and ill get back to you. For now get some recent pictures up