What the hell is this ???????

no. this is a serious problem. this thread got sidetracked a bit. you are displaying a bad calcium deficiency with what looks like could be P and/or k on some of the other leaves. you can not run an effective hydro setup without a ppm meter, how else can you manage the nute load in the res? with that being said, either there is not enough Ca present or it is being locked out by several things like too much of one nutes, off balance ph.
the best thing to do is to drain the res. refill the res and use 3/4 strength of what ever you were using before. hopefull this will be a balanced nute eqution and the problem will stop from spreading. the affected leaves will only get worse remember. u would really benefit to pick up some Calmag pronto.
what r the utes u r feeding, what strength and how often are you changing res.
calcium deficiency is rarely form salt build up. the first sign of salt build up are fringed leaf edges followed by a K and Mg deficiency.
you have to get back to a balanced nutes in your res and/or supplemented with calcium.

and use reg tap water not distilled. you can use hydrated lime half teaspoon per gallon boiled/disolved for the extra ca.

Why would he want to not use distilled water? I use a combo of RO and Distilled. I guess the water is not part of the problem, its the wild PPM's?

olosto said:

Why would he want to not use distilled water? I use a combo of RO and Distilled. I guess the water is not part of the problem, its the wild PPM's?

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the reason being that tap water 9 out of 10 times contains trace amounts of calcium and magnesium. distilled water contains netiher and considering he has a pretty bad ca problem, well...
as for your other post regarding flushing with distilled water...it is always better to flush with 1/4 strength nutes when flushing b/c the salts will bind together and you will remove more salts this way. distilled water does not contain the necessary ions for the salt ions to adhere to, therefore, only a realitvely small amount is removed.

hah he just has alot of things goin against him now, im surprised u didnt see problems before

yeah, like smokey said, without a PPM meter you have no idea how strong your nute solution is. you have no idea if you're going to kill your plants in one feed or not, it's probably a bad timing combined with ill-preparedness combined with too strong a nute solution type of thing.

but definitely a salt lockout caused severe deficiencies.

best bet to flush with PH correct water with that additive flush stuff you buy. don't give your plant anymore nutes, just straight water from here on out, since you said you're on your 7th week? you should leech/flush now if you haven't already and feed them straight water from here on out.

smokeybandit22 said:

no. this is a serious problem. this thread got sidetracked a bit. you are displaying a bad calcium deficiency with what looks like could be P and/or k on some of the other leaves. you can not run an effective hydro setup without a ppm meter, how else can you manage the nute load in the res? with that being said, either there is not enough Ca present or it is being locked out by several things like too much of one nutes, off balance ph.
the best thing to do is to drain the res. refill the res and use 3/4 strength of what ever you were using before. hopefull this will be a balanced nute eqution and the problem will stop from spreading. the affected leaves will only get worse remember. u would really benefit to pick up some Calmag pronto.
what r the utes u r feeding, what strength and how often are you changing res.
calcium deficiency is rarely form salt build up. the first sign of salt build up are fringed leaf edges followed by a K and Mg deficiency.
you have to get back to a balanced nutes in your res and/or supplemented with calcium.

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I use GH nuts and I've never added more than whats written on the back of the bottles. I also used my entire grow with tap water. This tap water PH is 8-9(of course I adjusted it)

But if this is a Ca prob, why is this hapening only on that part where those big CFL`s are pretty close? or is it just a coincidence?!?
So can a Ca prob be only on a small side of the plant?

However, I just flushed them with some distilled water and I'll let them only with distilled water for today and tomorrow. anyway, i dont think that this is bad for them because the last time when I flush them was 2 month ago. before the flowering stage.

So what should I add to fix the Ca prob???

driiifter said:

yeah, like don't give your plant anymore nutes, just straight water from here on out, since you said you're on your 7th week? you should leech/flush now if you haven't already and feed them straight water from here on out.

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as far as I see, this plant is 90%-100% sativa. So she still needs 3-4 more weeks. If I cut the nuts now...that will create a lot of deficiency, right?

its def not the lights cfl's won't burn the plant unless the plant is touching the bulb. idk it could possibly be over fertilized but i'm not sure why it's only on one side.

yanksck73 said:

its def not the lights cfl's won't burn the plant unless the plant is touching the bulb. idk it could possibly be over fertilized but i'm not sure why it's only on one side.

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They don't have to touch the light, with in half an inch and they can burn

First thing you need to do is buy 2 things, a simple PH test kit that you can get anyplace that sells fish, and a PPM meter. If this is your first grow with GH then you should read what people say about the ways to mix their 3 part formula, the good and the bad with the mixes. Take a sample of the water you are using right now and check the ppm (should be about 1500....ish they are big plants so over a bit is ok) and check the PH. Hopefully one of them is the problem and then their you go, but either way drain it out and add all new nutes with remeasured levels, and the PH rebalanced. You could call your city's water place to find out about your water or to have it tested, but check to make sure the ppm is 0 or close to it.

No mater what just remember that it is best to try one thing, like moving the lights, and then another if that doesn't work. Otherwise you'll never know what you did to fix it, also the leaves that are already brown are going to die no matter what you do, so just let them but make sure you don't get new ones, If you pull the lights back and you don't get new spots but the old ones get bigger then you fixed it (the plant pulls the food out of the leaf so it can die and fall off) if more leaves get spots then try something else. As the plant finishes the leaves will start to turn brown before the bud hairs turn orange, so it could just be the plant acting as if it is fall and using up the nutes in the leaves.

Personally I wouldn't even worry about it (if your ppm and PH are ok) 7weeks into flowering so brown on the leaves would make sense to me, and you want to see more as the plant finishes. The plant isn't growing to make you high, it is looking for pollen to make seeds with, and the hairs/buds is where this happens, when the plant doesn't get pollen it adds more hairs and buds to get it, pulling in energy from the leaves to do this.

I have noticed that the leaves getting the most light turn brown first (at the top) as they do most of the work

Try flushing your system maybe you overfed???

trombon84 said:

as far as I see, this plant is 90%-100% sativa. So she still needs 3-4 more weeks. If I cut the nuts now...that will create a lot of deficiency, right?

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most strands are 8-9 week flowerings. since i don't know what strand you have or how the strand flowers, maybe you do need a little more time.

just remember, the last 2 weeks of flowering do not feed it any nutes and those weeks should be used to flush/leech.

trombon84 said:

I use GH nuts and I've never added more than whats written on the back of the bottles. I also used my entire grow with tap water. This tap water PH is 8-9(of course I adjusted it)

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i also use GH nutes. the thing about GH is depending on the brand you use, the contents on the back of the bottle may give you directions that are only suitable for a certain type of system, i.e. hydro, re-circulative hydro, sub-hydro or drain-to-waste.

each system uses different strength nutrients. who knows, you could be administering your plants hydro levels of nutes which is way too much for a soil medium.

FUCK!!!! so i flushed for almost 3 days and I moved the lights too. today when I took a look of her, even more leaves with those fucking spots.
I believe it is a Calcium deficiency.

But how can I fix a Ca prob?????

I use GH nuts and .... obviously, I grow hydroponic.

How can I fix a Calcium deficiency??????????????????????????????

so my PPM is 1540. can anybody explain to me what does that mean????? so I can understand this PPM thingy????
Thanks

trombon84,

I am a newbie with a capital N, but looking at some pictures on this site in the plant problems thread it looks like nutirent lock. Lack of nitrogen. Mine were turning the light color in between the veins on the fan leaves like yours. I drained my reservior completely and refilled. I ran water only overnight before introducing the nutes at a low dosage. It hasn't spread any further, and the PH and Nutes are stabalized. May not get back some of the leaves, but the new vegetation is not effected by it. How far along are they in the budding stage? I know it's a standard practice to cut off the nutes the last 2 weeks of flowering. I am only guessing here as I am a newbie. Hopefully someone else will pipe up and lend you a hand. Good luck.