Iron Deficiency?

This thread shows similar leaf color and they say PH fluctuation. My water PH has been 6.5-6.7.
http://www.growweedeasy.com/ph-fluctuations-cannabis

Yes, going to bring down temps below 85F with CO2 tonight by turning AC to cooler temps. Lights are 2-3 feet away from plants already and won't go higher. I have never had an issue with light burn in this room however.

Does Pic2 look like nute burn to you? The last feeding was as follows:
2oz/gallon Age Old Grow
1ml/gallon CalMag+
1ml/gallon Microblast
1tsp/gallon Age Old Fish & Kelp
PH 6.7

Today I gave them a 5 second splash of:
5ml/gallon Magnum (mg and calcium supplement)
1tsp/gallon Age Old Fish and Kelp
.5ml/gallon CalMag+
PH 6.6

I'm not familiar with Old Age brand, I've never used their line of nutes. Same for the micro blast.
Ph seems high to me. My last OD grow I think I was ph'ing to 6.1 - 6.3, differant people seem to have their idea on what ph should be.
I read in a high times article to use 6.1 for soil, this seems low to me, but someone at a hydro store said the same thing, so I tried it.
I was skeptical about 6.1 so I fluctuated between 6.1 and 6.3.
I wouldn't rule it out that it could be nute burn. Its possible maybe they got too much Epsom salt even. But I don't think that's what did it.
85 is defiantly getting in the higher range. But then at the same time 2-3 feet for the lights seems far too.

I have one plant a bit taller than the others right now that is showing similar signs and it is from heat.

I know monster gardens has a light chart, showing how many inches to keep the hood from the canopy, but I can't find that chart.
I did find a similar chart. Not sure if that helps.

Here is one of my plants that I had started pretty well on its way into bloom.
But I moved it OD when the other OD was harvested.
You can see the same burn type of look on this plant.
I'm not worried about one leaf looking burnt.
I believe it was light burn.
This plant was grown with organic amended soil, so Ph is less important.
With organic amended soil the microbes will adjust to Ph as they need.

denverbudtender said:

This thread shows similar leaf color and they say PH fluctuation. My water PH has been 6.5-6.7.
http://www.growweedeasy.com/ph-fluctuations-cannabis

Yes, going to bring down temps below 85F with CO2 tonight by turning AC to cooler temps. Lights are 2-3 feet away from plants already and won't go higher. I have never had an issue with light burn in this room however.

Does Pic2 look like nute burn to you? The last feeding was as follows:
2oz/gallon Age Old Grow
1ml/gallon CalMag+
1ml/gallon Microblast
1tsp/gallon Age Old Fish & Kelp
PH 6.7

Today I gave them a 5 second splash of:
5ml/gallon Magnum (mg and calcium supplement)
1tsp/gallon Age Old Fish and Kelp
.5ml/gallon CalMag+
PH 6.6

Click to expand...

1ml of cal mag is pretty low. I use 5ml / gallon
Even on the bottle its dose is marked 3-5 ml
Seedlings is listed as 2 ml

I see you have something called Magnum listed as a mg and calcium supplement.
If that is your source of cal mag then you shouldn't need CalMag+ as well.
I really don't have much to say about your nutes though because I've never used Age Old brand.

Yes, I actually did use 5ml/gallon of calmag. Magnum actually has Magnesium and Sulphur, much like Epsom Salts. I thought the curling was 'praying for MG'. I'll take you advice and decrease the PH some and get temps lower than 84F. I also am putting timers on my circulation fans so they don't blow on plants during their night.

What were your amendments in your soil? Thanks again for your guidance!

I just ordered some bagged TGA Super Soil.
A bunch of people talked trash for me buying the bagged soil but I've used it a couple grows now and its worked well for me.
http://www.tgasupersoil.com/index.php?option=com_content&view=article&id=101&Itemid=626

What else is there besides bagged soil? I have been using Black Gold but want to move to a new medium. Have been looking at Lamberts. At what PH do you go for when mixing your ferts?

I mean when it it comes to organic amended soil, you can buy the amendments and mix your own amended soil, or buy it already mixed and bagged.
Here is some examples.
https://www.monstergardens.com/SuperSoil?filter_name=TGA
http://fullscalesoilandhydro.com/tga-super-soil.html

Or find a recipe that calls for other amendments and mix that.

You could grow veg through bloom with just water with some mixes, or feeding only carbs in bloom. Could give other additives too or keep it real simple. Hempy buckets are also said to be simple, for some reason people say you don't need to check Ph with a hempy bucket, same thing when growing organic you don't need to worry about Ph or ppm.