Well just so happens that my power went out today..so the fan didnt reset..so my temps went to 90 in the tent..got half inch growth from a plant thats moving slow...so ill rais the temps to 85 see if it helps..may be pot root temp also.
 
I'm only on my third photo grow but non of these have the deficiency problem I see in autos,could t he the shorted days/less light.
 
could t he the shorted days/less light.
That is an interesting observation. Has anyone tried dropping the hours back? Could it be possible that due to the intensity and focus of LED color spectrums, 20 hrs is too much? I'm not in a position to check that out right now, but it might be something to look into... :peace:
 
That is an interesting observation. Has anyone tried dropping the hours back? Could it be possible that due to the intensity and focus of LED color spectrums, 20 hrs is too much? I'm not in a position to check that out right now, but it might be something to look into... :peace:

The auto run I'm doing at the moment was 24/0 for the first 40 days then I flipped to 20/4,I'm starting a new run in the next few days so I will try 18/6 veg and 16/8 flower for comparison.
 
I only use my LEDs after the stretch and I'm just starting a new grow... (none have sexed yet). When I get to the change-out point, I'll try it. From my experience, the deficiency shows within a couple days of exposure to the LED's, so I should get some idea pretty quick.
 
Hi there everyone! I was thinking...maybe people in the organic threads using LEDs have something to say. Most of the people that use compost (I have one at home) have plenty of egg shells in it and shouldn't have any problems when using LEDs + organic soil & nutes.

:smoke:
 
Hi there everyone! I was thinking...maybe people in the organic threads using LEDs have something to say. Most of the people that use compost (I have one at home) have plenty of egg shells in it and shouldn't have any problems when using LEDs + organic soil & nutes.
I use TLO, exclusively... the normal amounts of organic calcium amendments (egg shells, oyster shells, dolomite, etc.) will not address this issue with the lights I use 20/4... I have about 140w (3wx80) per plant and my spectrum is swung disproportionately to the red side (bloom).

Perhaps, if someone was using less power and a more balanced spectrum, your statement may come closer to being accurate. :peace:
 
If there was a pill that used safe and common ingredients to prevent a horrible disease but it wasnt clear exactly how or why it worked wouldn't you guys want it? I'm not saying to drop the subject, I'm saying here is a way to prevent the problem and trying ask questions and help people.
If we have growers on here that don't get the cal issues with LEDs shouldn't we be basing our experiments off of their work? I personally don't care what the reason for the problems are because they arnt a problem for me and they don't have to be for anyone else either.

I would want to know why it worked. And why that amount worked? And what about using a little more? Is that good or bad? How about using a LOT more? If a little is good, will a lot be better? Knowing why it worked might give us insight in how to cure other similar disease.
And I have to say, it is pretty generous to compare a FF nutrient schedule to a pill of "safe and common ingredients" that prevents a horrible disease.

My friend has a very nice car. He doesn't know ANYTHING about how his car works. He does know how to maintain it. And he does so very well. So most of the time his car performs as he expects it to. However, when it does not, he does not have any idea where to start in solving his problem. Or even evaluating whether someone else's diagnosis of the problem. He doesn't need to be a certified mechanic, but understanding the reason things work when he did them would have saved him money and stress more than once.

And when dealing with living organisms- problems are not an if they happen, problems are a when they happen.

I like to hear people's anecdotal stories and experiences, as until the "why?" is answered the best we can do is listen to what has worked for others,, look at the parameters of their grows, find those that are similar to ours and see if their solutions work for us.

But to really solve the why? Multiple tests in very controlled environment using the same strain, preferably the same seed batch, with ALL variables for each batch accounted for. The variables among the growers just in this one thread alone amount to hundreds of relevant differences. Without empirical study it is difficult to narrow down the reason.

I am glad to see these discussions going on and what has worked and not worked.
 
Could someone please post a pic of a cal-mag deficiency ? I would like to see a few different pictures from different people/sources.
 
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