plants just dont look happy!

[Dosmokethereefa]

Problem: generally unhappy 1 has a couple of rust coloured patches

Medium/grow method: hydroton/coco

Feed: and supplements used: coco a and b, multi total, hydro silicon, calmag

water source: rain water until yesterday now tap water

Strain/age: 2x Royal Blumatic 1 x Royal jack auto

light used: 2 x 250 w m h

Climate: temp 75 rh 50%

Additional info they just generally look flimsy compared to photos this is my first attempt at autos

 

[GoAuto6]

I see no mention of pH, Coco like hydro and requires a lower pH 5.5 to 5.7 I bet If you check your Coco with a good probe you'll feel me it to be high.

 

[Garage_Grower]

How old are they? How often/much are you feeding them?

 

[Dosmokethereefa]

3 wk old yesterday fimmed after 3rd node fed daily just gone up from 1.5ml a + b per litre to 2ml per litre and they have 2 l a day each im gonna go check run off ph now and im waiting for tds metre comin

 

[Dosmokethereefa]

i fluctuate feed ph btween 5.7 and 6.1

 

[Dosmokethereefa]

its freezin here in uk ive had to turn extraction down to keep temp above 70

 

[Dosmokethereefa]

Run off ph 6.0 ? I think ive sorted it tho a few days ago i topped their pots up with coco n i think i was suffocating them i caught a branch earlier and it just dropped off it was rotting ive scooped loada of coco out exposed and washed their stems a couple hour ago ive just checked n they look happier if u get me ?

 

[Mañ'O'Green]

Run off ph 6.0 ? I think ive sorted it tho a few days ago i topped their pots up with coco n i think i was suffocating them i caught a branch earlier and it just dropped off it was rotting ive scooped loada of coco out exposed and washed their stems a couple hour ago ive just checked n they look happier if u get me ?

Well that is a lesson learned. Keeping the plant moist above the root line can open it to "crown rot" one of the many pythiums that are destructive. Botanicare HydroGuard and like fungisides are effective at controlling and preventing it. Your setting up the conditions that favor it with low temperatures and high humidity.

its freezin here in uk ive had to turn extraction down to keep temp above 70

Temperatures below 67°F will slow growth and foster rots. Better if you can get them up to 78°F Day 68°F Night. RH >40%<60%. Just do the best you can.