DWC deficiency

hello, I have been growing DWC for a year or so now with 2 strains, I recently put in 2 new strains to try them out and am having some problems with the both, which looks similar on them.

Strain - sapphire OG and Sour Diesel
Room temp - 78 to 80F
Water temp - 67 to 69
EC - 0.6
PH - 5.7 - 5.9 i shoot to be in this range (I let it fluctuate up to 6.1 before adjust)
Co2 - 1000 ppm

These are from clones, they are in week 4 of veg.

My other rooms are in week 4 and are double the size of these.

I foliar sprayed B12 + calmag both at half strength 2x last week but that has been it so far (it didn’t seem to change much)

These are the pictures of the leaves

First 2 pics are sour diesel

Second 2 pics are Saphire OG

Increase your EC. That's very low.

Also suggest a bio additive such as Great White or Mykos.

hotrodharley said:

Also suggest a bio additive such as Great White or Mykos.

Click to expand...

What do you think a proper EC level would be for this age of plant?

I have another room running at 450-500 in first week of flower and they are flourishing very well.

Both rooms followed the same scheduale but this one seems to have this issue.

I’m following the cultured solutions feed chart.

Also in a DWC set up I would need to add orca in order to keep it sterile not a great white correct?

I use great white in my coco rooms.

I would guess from afar at least 450-500. Give it a few. You're right about the White. A biological so it helps nutrient uptake and healthy roots. I use Mykos and it's supposed to be formulated for hydro. I'm growing in peat, perlite, vermiculite I mix myself so every watering is a feeding

Wccph said:

What do you think a proper EC level would be for this age of plant?

I have another room running at 450-500 in first week of flower and they are flourishing very well.

Both rooms followed the same scheduale but this one seems to have this issue.

I’m following the cultured solutions feed chart.

Also in a DWC set up I would need to add orca in order to keep it sterile not a great white correct?

I use great white in my coco rooms.

Click to expand...

I got this instead of GW because I'm rooting some cuttings for DWC buckets. This is supposed to work even in organic reservoir solutions. Have not used it that way yet .