Very weird issue need help: Plants fades and dies when going HPS

[Bobby33310]

Hi,

Ive been growing +Speed from Sweet Seed for 4 weeks now, on Metal Halide 400 watt, in a hydroponic system.

Ive decided to change the light to a 400 watt HPS (the lamp is fairly new), but after 10 minutes, the plants are fading and just becoming very soft and flabby.

Do you have any idea why it's doing this?

 

[Bobby33310]

bump

 

[CO Finest]

When is the last time watered was changed?

 

[Bobby33310]

I tried the light right after changing the water, and 2 days after changing it. It has the same effect on the plants.

 

[dawill1967]

I tried the light right after changing the water, and 2 days after changing it. It has the same effect on the plants.

Sounds like a heat related issue. You may have to water more often when changing.

 

[Bobby33310]

Sounds like a heat related issue. You may have to water more often when changing.

How is it a heat problem? With MH, the plants are just fine. And how can I water more often in a hydroponic system?

 

[shadowaff]

did you also change the nutrients or JUST the light? doesnt really makes much sense to me... care not to over feed too

 

[Ddosed]

Hey man! My experience with HPS is that you generally only use it when flowering. Either use normal florescent lights or a 400w Metal Halide. The HPS are very stressful and hot to babies. Now I could be wrong, but that is my two cents.