Anybody actually know???

Hi guys, i have been growing for a few years now, always Hydroponics (DWC, IWS)
1st time i have ever done coco, i am having a little trouble (think possibly over watering)

So i have 10 plants all together, 6 are in 11L rhizo (fabric pots).
Other 4 are in dwc.

1 x gavita pro line 1000w light (running on 750w)
1 x 600w light (running on 400w)
Room temps with lights on 24c-27c
Lights off - 17c-20c

Humidity with lights ON - 40-48%
LIGHTS OFF - 50-60%

Good air movement with a big fan and a good outtake

Nutrients are all shogun:
Katana roots
Hydro grow A & B
Silicon
Zenzym
Plant magic calmag

PH - 6.2
EC 0.8 - 1.0

They've been topped and super cropped and was fine after

Hand watering 2L every other day

The plants are now drooping and leaves curling inwards

Any ideas?

Daily water/feed?

BobThe420Builder said:

Daily water/feed?

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Every other day they get hand fed 2 litres, i let them dry out a bit ( light brown coco on top and light pot)

Never let Coco dry out

BobThe420Builder said:

Never let Coco dry out

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You reckon i could be under watering?

Lol

Yes I reckon

And not enough. Should be a lot of runoff to clear the day before salts.

myke said:

And not enough. Should be a lot of runoff to clear the day before salts.

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Ok...so I'm underwatering?

What I do is water to runoff at lights on then 6 hrs or so later water again just to runoff. Remember it’s hydro. Some water 4-6 times a day.

Bushbaby11 said:

Ok...so I'm underwatering?

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Yes they need a good flush. Mix up some nutes on the low side and wash out all the left over salts. You can’t overwater a mature plant. Seedlings or clones ya you can give too much. If your pots are full of roots water on.

20 % extra runoff each day to remove the nutes from the day before. It’s just that easy.

myke said:

20 % extra runoff each day to remove the nutes from the day before. It’s just that easy.

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Ok I'm with you mate, will give them a good soaking tomorrow until run off, see of they go cheers mate

Bushbaby11 said:

Ok I'm with you mate, will give them a good soaking tomorrow until run off, see of they go cheers mate

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I’d doit right now. If you haven’t been watering to run off and you’ve let it dry. All your nutes are now salt. So that will take some time to remove.

myke said:

I’d doit right now. If you haven’t been watering to run off and you’ve let it dry. All your nutes are now salt. So that will take some time to remove.

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I can't atm mate, not there but will when back

Good luck man. Will take a few waterings to clear out. You can use pHed water to flush then immediately mix a low EC to fill them again. No use wasting nutes on the flush.

Did you check the ppm of the first runoff? Ill bet it was crazy high.

myke said:

Did you check the ppm of the first runoff? Ill bet it was crazy high.

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Yep lol was silly high.
They're back to normal now, getting a good 2/3 litres watering every morning until run off, they're thriving again.
Thankyou for the help