Go ahead and remove any and all dead plant matter. Leaves, roots, entire branches if needed.
Then look close at all the leaves that look bad. You can’t afford to remove any plant matter that will aid in recovery but you also don’t want to waste plant resources on leaves that are too far gone. Not too much removal or do it a little each day and see how they respond. You need more green solar panels to build buds so concentrate on what you can save and hopefully see some new replacement growth. If you do that means you are back on track and it won’t hurt to watch it. If they continue to decline I’m afraid you are wasting time and should get seeds going.
What is the light? Regardless what it is back it off either with a dimmer or more space.
Focus on a perfect environment. It’ll help you next grow to get this dialed in now. Temp and rh are relative to your conditions. What is your air temp high and low and your humidity? Keep in mind temps will go down with dimming the lights.
What is your temp and rh control if any?
Do you have a blower thru charcoal? I assume you are exhausting into a lung room. Please explain all that. What are your lung room conditions if using one.
I believe your res temps are low last I looked. How is that controlled?
What is the situation with bubbling?
In order for plants to thrive in RDWC (if your expectation / reason for RDWC is max growth) you need to take complete control root zone and atmosphere in conjunction with correct lighting at that plant stage. That really is the point of hydro anyway- removing limits to growth. It’s a study in horticulture to get good at this.
There are some tools you should get if you don’t have them. If you do post the data.
Accurate temp and rh sensor that stays in the tent. I like SensorPush.
This is my lung room (basement) as this tent is currently shut down and open
View attachment 101703
That VPD at the bottom is the engine that drives plant respiration and transpiration. It’s kinda like your bmi. It’s a blunt instrument but puts you on the fairway.
View attachment 101704
Another tool is an ir temp gun. Those charts work off leaf temp not air temp. Here in the us they are cheap. This is why we care
View attachment 101709
Next tool there is a ppfd app to measure lights a lot of folks use. I’m gonna call in backup on that I don’t use it.
—————————-
What ppfd app works best for the phone? @Aqua Man @steamroller @GoodShit97 @Stoneyluv @MiGrampa @Bandit420
First one to answer gets a cookie.
——————————
How are you measuring ph EC and temp? Are you using gh ph up and down?
I believe you said you are starting with RO water.
Getting those data points we will dial you in. You will want this before your next grow anyhow even if we can’t save this pair.
You got more seeds handy? If not time to plan out the germination what is your process for getting seeds wet? What seeds? Hint hint go photoperiod fems. Germ asap.
Even if you completely recover this grow we can clone the best of what germinates to give you plenty of time on this grow. Cloning is an important skill but can be done easily if done correctly and anyone but goodshit can talk you thru that lol.
Take your time to reply we will read it. The more info you give all in one post the more likely the experts will help you.
There is a format you can follow in the new user section if you want.
The RDwC setup is in a 1mx1m tent, ACI inline fan 6", charcoal filter venting out of the room (through the roof), so not back into the lungroom. Also got an ACI humidifier and heater, 2 6" oscilating fans. All ACI equipment is hooked up to an ACI Ai+ controller. EC/ph en temp are measured and logged 24/7 by a Bluelab Guardian Wifi, for mixing nutes I am using a Apera pen that can read ec/ph/tds and temp.
The small room itself has an split unit airco that keeps daytime around 25C, night time 18-20C. Humidity is around 55-65%, VPD is around 1.0-1.4.
For the RDWC I am using a chiller that keeps the liquids at 18C. Also upgraded the airpump by times 3, and also using three airstones instead of one.
Lights are Mars Hydro FC-4800evo with the four Adlights they offer (Blue during veg, IR/UV/DeepRed during flower), I am using the PPFD Meter app with the bluetooth UNI-T UT383BT wireless lux meter. Don't need an defuser with that device. I measure from the top of the canopy and keep the lights 36cm away like MH describes. Currently around 570-600PPFD.
I am using ph down to mix the nutrient mix to the desired pH.