Hey there Tackle, to reduce your humidity increase the airflow in the tent as well as the extraction, pulling all the humid air out and making sure the air you put in is as dry as possible. without a dehumidifier, you can also reduce the amount of time there's a lot of humidity in your tent by watering less but more frequently. If you need a dehumifier, might as well consider buying one as you'll end up using it every grow right? Hope this helps ! 🚀