PH 5.7-4.7 in 12 hours. DWC

[JovialGent]

Some pics..
Only a few leaves showing deficiencies.. hard to see I know with lights.
Roots are just the same. No change.. so thinking of ruling it out of being a main issue..
Will double check res for ph before lights out

 

[rkymtnman]

pic 708 i see tip burn (too high EC) and some leaf edge curling up (too high EC/ too high temps)

 

[JovialGent]

pic 708 i see tip burn (too high EC) and some leaf edge curling up (too high EC/ too high temps)

Yep! Lol.. which quite confusing after i dropped ppm 200 everytime i topped up to 300 odd

 

[JovialGent]

Temps are consistent 26 and 21..

 

[rkymtnman]

Just prepping new res now..
Calmag to 240...
Maxi to 600

so your total ppm is 600? water + cal/mg+ maxi ?

 

[JovialGent]

so your total ppm is 600? water + cal/mg+ maxi ?

It's is now after the plain flush for more then a day yes

 

[rkymtnman]

It's is now after the plain flush for more then a day yes

post what the ppm is at after 24hrs and then 48hrs.

did it go up, stay same or drop.

 

[DeepWaterDean]

No never have what you going to use it for?

UC roots is hypochlorous acid. This thing makes it from water and table salt.

 

[Octastich]

do you think maybe too small of a res size is the problem. too many roots to water volume plus amount or air being pumped in

i have noticed with my grow. the more my roots fill my res the less stable my ph is and i see bigger changes to my ph

 

[JovialGent]

do you think maybe too small of a res size is the problem. too many roots to water volume plus amount or air being pumped in

i have noticed with my grow. the more my roots fill my res the less stable my ph is and i see bigger changes to my ph

I really couldn't answer that tbh. It is a 60 litre barrel though. And ph generally was quite stable in it. Increasing slightly over several days.
PH today is 6.2
PPM is 511
Water level has dropped approx 8 litres.
So I'm assuming she's back to eating.
A couple drops of acid to bring ph down is all im doing and will check again tomorrow

 

[rkymtnman]

PH today is 6.2
PPM is 511
Water level has dropped approx 8 litres

sounds good to me. the flush seems like it kick started them eating again.

 

[JovialGent]

If it's dropped again like that tomorrow that's gotta be a cure..
If only I did that sooner.. instead of just reducing EC all the time.
Live and learn

 

[rkymtnman]

If it's dropped again like that tomorrow that's gotta be a cure..
If only I did that sooner.. instead of just reducing EC all the time.
Live and learn

one of the first and most important things i learned about dwc: got a problem? 24hr flush and start back on lighter nutes.

 

[myke]

I think this is why it’s so easy to grow in dwc,Unlimited mulligans.

 

[maxamus1]

How much cal/mag are you adding to your RO water?

You should take your RO water and buffer it to 200ppm with calmag and use that as a starting point adding you nutrients after and then PH to desired level.

You should find your water keeps a more stable PH that way.

So y add the cal/mag before everything else wont that mess up the sillica?

 

[JovialGent]

So y add the cal/mag before everything else wont that mess up the sillica?

Adding silica first yes.. but he meant I need 200ppm of calmag if using ro water regardless..
I forgot the rhino so 200ppm with calmag first

 

[JovialGent]

Ph didn't change today btw.. nor did ppm.. so nothing was altered

 

[rkymtnman]

nor did ppm

keep an eye on this. i like to see a daily drop. confirms to me that they are eating. water level dropped?

 

[5BY5LEC]

Yeah, what your water level did in that time in relation to your readings is the key to understanding what you are seeing.

 

[JovialGent]

Water levels dropped.. but not as quick as usual. Ph remains stable.. ppm back to 580....
It will need a top up. But can't get RO till tomoz.
When I'll test again...