Subcool soil. Potash? Or nute Burn?

MongolianMonkeyNuts

Well-Known Member
Sup guys.

Going in on week 6 of flower and half my plants are going through some problems.
20161223_000840.jpg 20161221_112841.jpg 20161223_000840.jpg 20161221_112841.jpg 20161223_000840.jpg 20161221_112841.jpg

Some leaves dont have burns on the edges. Some start in the middle of the leaf. And leaves effected are on top and middle of plant. Not the bottom ones.

I decided to go with subcool super soil since i had a bunch of leftover ingredients from like 2 years ago. Left it cooking for 2 months. August and October.

I veged with 600w MH and flowering with 1000w HPS. Using R.o water. Sometimes i add a bit of calmag and some epsom salt since i didnt added it to the super soil.
I did add a guano and casting tea along with molasses during week 2 of flower. But other than that, its just been R.O water.

Runoff is registering at 6.6 ph.

Strains affected. Dark Star and MK Ultra.

They are in 7-10 gallon pots. If its nute burn, FML. I really dont want to deal with flushing. Inreally hope its something else.

However, the other half is doing pretty well. My Pineapple Express #2 is doing pretty well. 20161221_113015.jpg
However, i do see some yellowing on a couple middle leaves.

Heres the entire 5×5 closet.
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Top left and the 2 on the right are showing problems.

I really try to keep humidity up. Hence, the old wet clothes laying on the ground. I average 20% humidity with carbon filter on. When off, it ranges 40%.

If you need anymore info, please let me know.

Thank you all in advance for the tips and help.

Sammy.
 

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