What size fan and carbon filter do u guys recommend for the secret jardin darkrook grow tent DR80? The tent measurements are 2.8ft x 2.8ft x 5.3ft. I was planning on getting the 6" fan and carbon filter combo but i think it might be to big and heavy for the small DR80 tent. Would it be better to just get the 4" fan and carbon filter instead? Im just trying to piece everything together before i make a purchase. Thanks.