What are these brown spots on leaves!!

[dougefresh]

-indoor
-hydroponic
-hyrdroton rocks and rockwool in a hydro system
-Tap water
-6.7 PH
-4 weeks old
-mother earth supertea from advanced nutrients (full dose every week)
- 400w MH 1 foot abovr plants
-78 degrees durting light and not sure during dark
-38% humitiy
-18/6 light schedule

Help please, my plants are growing brown spots and are reeally turning yellow does anyone know what wrong. Is is calcium deficiency and nutrient burn ??

[Weedhound]

I'm pretty sure I told you on one of your other nineteen threads to keep the ph between 5.6-6.2. Unless you do that your plants will not do well and I'm afraid that's the bottom line in hydro.

[hybridlove420]

one more nugget of advice: 38% humidity is pretty low for vegetative growth. try to get it closer to 50-60% if possible

-go at it with spray bottle daily, or get humidifier

[dougefresh]

i know weedhoud...(i have writtent alot of threads, but still no1 has given me an awnser of what is wrong) the PH is right now, I am just giving the ph of what it was as they were getting sick.

[stinkyattic]

It really was a pH problem. Don't write a lot of threads on the same topic please. Those are symptoms of nute lockout. The damage won't heal, so look at how healthy new growth is, or if it spreads.

[Weedhound]

LOL! Douge did you think I was just dropping by to make digs about your ph? Sorry you didn't realize that I meant it was your problem all along. ;)

Your plants can only uptake nutrients in hydro within a certain ph range. If your ph goes out of that range (as yours did.....alot) your plants cannot take up the nutrients in your water....no matter how much or how many there are in your solution. With an abnormal ph you WILL see nute defs and such things and they WON'T improve until your ph does. Ph is ALL in hydro.