Help! Plants dying...

[rugby]

Hi there,
I don't know what the heck happened here but just over the past few days the plants went from looking super healthy to this.
They are growing in an Aerogarden Farm hydroponic system.
I emptied the water and reapplied nutrients but they just continue to wilt.
Any thoughts?
Thanks!

 

[Mr.furley]

Looks like light burn

 

[SoOrbudgal]

I agree with some nute burn on top of it.

 

[rugby]

Anything I can do with them now? Cut them back?

 

[Mr.furley]

Move your lights up and check your PH, TEMPS, HUMIDITY.

 

[rugby]

Temps are fine as is humidity. Moved the lights up before this happened. The pH level of the water is 6.89. Maybe too high?

 

[Mr.furley]

Yes. Hydro need to be a lot lower
5.5 to 6.5

 

[rugby]

Thank you.

What can I add to lower the pH? I saw white vinegar? There are probably 2.5 gallons of water in each receptacle.

 

[UndergroundFarmer]

Get some General Hydroponics pH Down if you can. Vinegar will work if it's all you can get but don't put any more that 5 mL per tub at one time. Wait a while and retest then repeat if necessary.