4week Flo - Issue

[DaDDe]

Hi Guys,
first of all this is my set and sorry for my non perfect english.

Ikea closer60x100x230
11LT bucket
Osmotic water
Advanced Nutrient's base + Big Bud
2x intake passive Air
Air extraction Blauberg 12.5 220/280
Ventilation fixed betting under the lamp
Humidifier
Reflector, Cooltube, 250 MH + HPS 400
Light Cycle flo 12/12
Cycle Start Date: 28/2

Temp water 20°
Temp closet 20° night - 30° day
humudity flo stage 32 - 39 %

So here we are.
i've got 3 baby in flo stage and some issue is coming.

This di the first one, the bigger one, 1.30 mt tall at 4 week flo

a few weeks ago has begun to notice an apparent lack of calcium (i use only osmotic water). I started to add calcium 2.5ml for 11lt of water ( Bionova calcium 15 % ) but the situation does not seem to have stabilized . the young leaves show no signs but have begun to look at some red steam (mg ? ) . given the proximity of the harvest I would avoid trial and ask your experienced advice.

 

[DaDDe]

And this is the second one, 1.25 mt

some days the tips of the leaves have begun to " burn " like a calcium deficiency , it began to give football 2.5ml as the other plant.

Also here we have some red steam that began to be seen , and some of the underbrush leaves are dying . some advice?

 

[DaDDe]

Ph is always beetwen 5.7 / 6.0 and Ec is about 1.0 ec