Seedling problem

[sconefirm]

Hi guys,

This is my first setup and grow so please be kind

My setup:
- 1x1x2m tent
- 600w dual spec HPS with reflector
- 6inch fan
- Black Orchid Mixed-flo 100 filter kit (exhaust system)
- Second in-line fan to pump fresh air in

I've set up the tent and put in my seedlings in there on the 14th of March. I'm running a 20/4 cycle since then.

Today I have noticed that the leaves are starting to look a bit weird, they're shiny, some of the leaves have yellow burns at the end of them, can be noticed once zoomed in on picture. I have been using 6.5 ph water to water them. I have given them 0 nutrients as they're still very young. Can any one help me with the problem? I think it could be heat or light problem but I'm unsure, the temperatures inside get roughly to 32-33 degrees C. With the fan 6 inch fan switched on, I measure around 28 degree C due to the wind. Out of 4 plants only 2 seem to be affected so far.

Thank you

 

[spek9]

The seedlings look fine right now, but 32C is WAY too hot.

You need to get that down to below 27.5C (~82F) at the very most, and preferably down to 25-26C (77-78F).

 

[sconefirm]

The seedlings look fine right now, but 32C is WAY too hot.

You need to get that down to below 27.5C (~82F) at the very most, and preferably down to 25-26C (77-78F).

Thanks for your swift response mate, I'm glad to hear they're ok lol. Any suggestion on how to bring it down? I have the 2 in-line fans running at full speed (1 bringing air out connected to filter and second bringing fresh air in from outside), I also have the 6 inch running at full speed and raised the light a bit.

I forgot to mention I cannot have the tent open as I my window is facing the main road