Leafs are turning Brown and dieng.

[Zomby]

Hei.

I am growing in 3 seperate tents. One Airoponic, one drip and a RDWC. i am using a 3 part nutrient sulution from GHE. I have a huge problem in my RDWC system.

I am Running 2x 600 W MH bulbs.
Fans from jardin.
Alien hydroponic system.
10 ml gro
10 ml micro
5 ml bloom
An industrial humidifier
2 exsoust fans 3000m2


I noticed the lower leaves started to turn yellow with Brown spots. They now curls gets Brown and crispy.

I startes of with a PH of 6.7, but have manage to get it to 5.8.

I have a ppm of 1200. My water have a ppm of 50 when i add it to the system.

My water temp is 18-20 celsius.

My air temp is 21 Day and 19 night.

Humidity is around 40-60.


In my 2 other tents the plants look amazing and i run the same nutrient sulutions here.

I have ordered cal mag. Couse it looks like a calsium deficensy.

Please take a look and help a guy out.

Thanks.

[SirSmksAlot]

At first glance it looks like heat stress. What do your roots look like?

[SoOrbudgal]

I've had that look when temps too warm and windy.

[Zomby]

My roots have a slight Brown color. I belive this is from befor i installed my chiller and the water temp went to 25 CELSIUS. And also the nutrient i use color the roots.

Now i have a water temperatur of 19 degrees.
Air temperatur of 21 degrees. (Day), 19 night.

i will update the post if i see anny changes.

[SirSmksAlot]

If you're not using any benificial bacteria you could add a bit of h202 to your resivior. The cal-mag couldn't hurt. Your Temps sound good. As budgal mentioned it could be wind stress as well. Do you have a strong fan blowing on your plants?

[Zomby]

I will add Hydroguard to day, and yes i have some strong 30 W fans i have switched them to 18 Watts, so hopefully i will see some changes soon.

Thanks boys.

[Eliot Pryor]

Ok I have seen that on my plants. It was bugs of some microscopic size. I sprayed neem oil on everything . It seems to be under control now but ?? (spider mites ?)