Help!

My whole crop seems to be suffering from something and I can't figure out what it is. I use an aero system with Botanicare nutrients mixed to their exact recommendations at 1500 PPMs, my room is 50% humidity at 78 degrees, my water is RO, the light is 430 watt SonAgro and a 1000 watt PlantMax HPS, the plants are 1 month into flower (but they've been looking like this since they were seedlings on the lower leaves - now it's everywhere), and this problem is shared by 5 different strains of pot. The roots look very healthy. I keep the PH at 5.8 and I have independantly calibrated both my ph meters. I thought it might be a magnesium insufficiency, but I have foliar sprayed a 200 PPM mix of Cal Mag + on them with no change. Anybody know what this might be?
Thanx, Bob in Arizona

not that that is main problem but are u spraying with lights on
but for other problem im guess cal/mag def maybe way wrong

Not sure, you can google plant deficiencies and click images and they have a lot of charts. Foliar feeding at 1/3rd strength won't hurt. I would give them the full feeding of botanicare and cal mag. spray tops and bottoms of the leaves soon after the lights come on so that the stomata are open. higher humidity is better for foliar as well cause they know to close to preserve water if the air is too dry.

Skunk.n'the.Trunk said:

Not sure, you can google plant deficiencies and click images and they have a lot of charts. Foliar feeding at 1/3rd strength won't hurt. I would give them the full feeding of botanicare and cal mag. spray tops and bottoms of the leaves soon after the lights come on so that the stomata are open. higher humidity is better for foliar as well cause they know to close to preserve water if the air is too dry.

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looks like cal /mag but these things so hard to tell

I never spray with Calmag, use that stuff very sparingly. I use it 2-3 times an entire grow at half dose.

BatMaN SKuNK said:

I never spray with Calmag, use that stuff very sparingly. I use it 2-3 times an entire grow at half dose.

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i dont either
i use eps salt every 2 weeks

to me that looks like overfert

Yo you gotta some type of issue possible over feeding 1500 ppms is on
the HIGH side? Have you had successful grows using this method of
hydroponics? Or are ya a Noobie?

High All,
Thanks for the responses. The general consensus seems to be that it is a Cal Mag problem, but I've been using the exact formula that Botanicare recommends both for veg and flower. It's also exactly what StinkBud uses. However, since the leaves look like the pics of the ones with Cal Mag deficiency in the sticky on this section of the forum, I started supplementing with the Cal Mag foliar spray as mentioned above. There has been no discernible change. Re: the PPMs being too high, I don't think that is the problem -- I ran everything at about 1100 for the first 3 weeks of flower and that made no difference. I have let the PPMs drift up to their current level just in the last week or so, and StinkBud says that he runs his mix at 1800 and up. And I have had great grows at the higher levels. Anybody else have any ideas?
Thanks again, Bob

How close are you lights? I had similar probs, started with little brown spots then got worse. Try raising the lights to 12"+, worked for me.

I thought the same thing for a while, MrMean ...I noticed that the problem seemed slightly less on the leaves farthest from the light, so I raised them. The 430 is about 20" away and the 1000 is about now about 36" away. However, I did this about 10 days ago and I have seen no improvement.
And, I have the same problem in my veg room, in which I have seedlings and clones under T5s with about 18" of space.
BTW, reps for all. Thanks for your help, and please keep the ideas coming. This is killing me.
Bob

MrMeanGreen said:

How close are you lights? I had similar probs, started with little brown spots then got worse. Try raising the lights to 12"+, worked for me.

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I never heard that .

The affected leaves will keep their damage, its new growth that you need to look at, do they have the same problem?

have a look for any sort of insect or lava also, check were the leaves overlap at the base.

usually rust colored spots are mag def

Really it seemed to be Mag def ...I have this prb right now u can chck Plz check
https://www.rollitup.org/marijuana-plant-problems/467439-issue-my-rooms-plz-14.html
...
LAst week i bought Mag nut (14mg) and I saw it colored the water yellowish.... I watered my plant And i felt they were be worked...
But some one tell me that use epsom salt I searched for some drug store and they said they dont have any and one drug store I sold the salt with low in Na ...I add yesterday about 400ppm of that and watered twice in a last day with, I worried too much cause I didnt let c them until afternoon.In the afternoon (the light turn on about 9 hours) I changed it to my flowering nut and I promise to c them today healthier ....
any idea >