HELP! Curly, rusty spotted, leaves.

[Porko]

What do I need to do to stop this? Grow setup - 4x10 tent 1-600w viper spectre in center / 2-600w kingsled 1 on each side rh-45-50, temp75-80, using ffof and no additional nutes. Auto flowers ph low 6.2.

[Mr.furley]

Looks like Heat? Light? Nutrient? Burn. It's hard to say with all the burple light and the little information, history, details......................................

[Colombo]

Some serious problems on this grow !

[Porko]

I added more pics without the light. Please let me know what ya think now.
Fox Farm Ocean Forest mixed with about 10% Coco Coir & Pearlite in 5 gal buckets
Growing autos 2 LSD25's both sick, 2 Sour Diesel one is healthy the other has started showing spots & curling last few days, 1 Crystal Meth - Healthy but not much bud, & 1 very healthy Hindu Kush
Been watering with Dehumidifier water - 6.2ph

[starramus]

How far away are your lights from the plants? check this https://www.growweedeasy.com/led-gro...-cannabis-buds

[Porko]

20-24" - Moved them up about 2 weeks ago when I 1st noticed the rust spots

[Porko]

Started happening about 2 weeks into grow and i noticed green fungus from to wet of a pot on one pots soil, no water for 12 days until meter was into the dry, day after starting to water again rusty spots started showing up, then some clawing, two plants in photos went from good to bad the in 36 hrs. 3 others in tent all are fine.

[Mr.furley]

I would believe that the fungus has caused you to have root problems, did you remove the top or just wash it into the soil?.
Dehumidifier water? What's that about.
Do you have drainage holes? Do you water to a little runoff?
How often do you water? And how much?
You should cover or paint your buckets black so your roots don't get light. Moisture+light+warmth=root/mold/fungus
Do you notice a sulfur smell when you water?

[Porko]

Removed top 1" of soil in the pot that had the fungus. It was about the size of a nickel
Water collected from the house dehumidifier has 6.2 ph or less
Yes, they have drain holes.
Water to a little runoff sometimes but not always.
Add water when meter is in the dry zone & pots are light.
1/2 gal to 1 gal per pot
I'll cover the buckets. Thanks for the tip.
No, on the sulfur smell.

[Mr.furley]

How old are your plants and the soil they are in?

[Rwise]

I used a moisture meter for a while, the 8 week autos took 120 days. I put it down and started feeling the soil surface. The next plants are right on schedule. ,, by the "meter" I was watering every 8-12 days, feeling the soil 2-5 days,, good luck!

[Mr.furley]

Yeah those things are junk for indoor cannabis

[Porko]

They are 49 days. Fresh FFOF w Coco Coir & Pearlite added. No additional nutrients. Yesterday I switched back to well water which hasn't given me issues previously. Will watch closely for improvement or continued decline.