help

need help with my new grow any tips plz and how many vents 2 put in the room for the air in take and out take thnks

You will need a lot more detail on what you have and what you are asking to get any responses.

probably 2, an intake and an outtake, but how big is your room? what lights are you useing?temps?

i have now got my plants on flower and the leaves are going yellow can u tell me wot this is the temp of my room is round 85 to 90 is this ok using a 400 w can u give me any tips thanks