Proper CFM fan to prevent mold. Need Help week 4 flower

I have a 4x4 tent with 7 flowering plants. It has gotten pretty crowded in there. I have a 6" Can Fan with 270 cfm. Im afraid that I might need a little more cfm's. Might this be the case?

Now I have noticed a slight musky smell in the tent. Almost like mold is forming. The Humidity got out of control last week and I placed a dehumidifier in the room to help. I am also going to get some fungicide. Is a 270 cfm fan to small for a 4x4x7 tent with 7 flowering plants. Especially come week 8.

You could try moving the air from under the plants with an oscilating fan. If you have not cleaned up any of the bottoms of the plants for increased airflow then the chances are that there are stagnant pockets of air hanging underneath your plants.


J

As much moving air exchange as you can get if humidity is a problem and a dehumidifier isn't around. Like jondamon was saying clean up alot of the growth on the bottom of the plant to promote air circulation through the canopy and under-growth. An oscilating fan is great too, just mount one up in the corner to keep the air moving around plenty.