Calcium deficiency or something else?

[rats]

Hello, this is my first grow and I'm starting to see some brown spots and yellowing at first it was isolated to the first true leaves but it looks like it's starting to move up with the oldest growth. They are ~17 days old and were transplanted from solo cups yesterday evening.
They were in ffhf in the solo cup and now they are layered with ffof on bottom ~50% and ffhf for the top.
I've been using silica, calmag, seaweed and flora series micro and grow and getting my water to the correct pH. I've been using about 50-75% recommend nutrients to start I am using RO water with a starting ppm of 4. After transplanting last night I saturated the soil with a mix of calmag, seaweed and compost tea and my solutions ppm was only about 180. Do I need more calmag or is this something else?

Daytime temp 78 Rh 70% using AC Infinity ionframe 6 light, had it about 18" away and 30% brightness before transplant and moved it up to 24 inches after transplant. I'd like to fix the issue before it gets out of hand any help is greatly appreciated!

 

[rats]

Video

 

[imgrowing]

FFOF has plenty of nutes built in, not sure about FFHF though.
i used FFOF (before it was banned here) and didn't feed anything until around 2 months.
just my experience though.
i'd lay off feeding them if i was you IMO

 

[rats]

FFOF has plenty of nutes built in, not sure about FFHF though.
i used FFOF (before it was banned here) and didn't feed anything until around 2 months.
just my experience though.
i'd lay off feeding them if i was you IMO

I won't be watering these guys for a little bit I'm guessing but I'll give it a shot thanks!
I was worried about stripping nutrients with my water since it's so empty.

 

[imgrowing]

my water from the tap was 35ppm and ph8.2, and i never ph'd the water in FFOF.
FF is considered soil so no reason to worry about ph as soil buffers itself.
their are others that disagree but that's my experience with it.
i sure miss FFOF

 

[rats]

I could still use some help with this if anyone has suggestions. I did a soil slurry test and it showed a pH of 5.1 what can I do right now to help the plants while I wait for the pot to dry so I can try and up the pH in the pot. 2 out of 4 are looking pretty good and happy the front right one looks happy but the spots are spreading upwards pretty quickly and the back left one is not looking great.

 

[JIMKSI64]

Plants look fine
Only plant leafs effected look like they have been touching soil.
Not unusual to see this presentation on older growth and touching soil or getting wet.
Yer top growth looks good.

At this time to me the plant looks close but not at the full soil drench growth. The roots have not grown enough to use all the water that needs to be ran through for a runoff test and hopefully you can still get a 4 day turn on watering but with a smaller plant and prolly higher humidity than later in veg the pot humidity reduction may go way up.

Only recommendation I have is to remove the rusted necrotic stuff before it spreads and ensure each plant gets watered when it is light appropriately.

 

[rats]

Plants look fine
Only plant leafs effected look like they have been touching soil.
Not unusual to see this presentation on older growth and touching soil or getting wet.
Yer top growth looks good.

At this time to me the plant looks close but not at the full soil drench growth. The roots have not grown enough to use all the water that needs to be ran through for a runoff test and hopefully you can still get a 4 day turn on watering but with a smaller plant and prolly higher humidity than later in veg the pot humidity reduction may go way up.

Only recommendation I have is to remove the rusted necrotic stuff before it spreads and ensure each plant gets watered when it is light appropriately.

Okay thanks.
The first true leaves of the back left plant were touching the soil after they died and I cut those off, no leaves are touching the soil now it just looks that way in the pic.

Is the fact that it's been moving upwards on the oldest growth not really a concern at this time?

I saturated the soil when I transplanted them on the 2nd and the pots are still pretty heavy so it'll be a little bit before it's time to water again. Keeping the tent about 78° 65-75% rh.

I'll trim the dead stuff off. I'm assuming topping it now is probably not a great idea? They've got 5 nodes but I don't want to stress them out more