no rocks use a thermometer, read, read, read.
Shovelhandle Reviewed by Shovelhandle on . Soil drying out quick. Hi Folks. This is my first time posting and I'm a first time grower. I am using a Rubbermaid grow box. I have noticed that my soil is drying out after just a couple of days. The one thing that I question is about the fan. Instead of using a 12v converter and a fan out of a computer, I'm using a similar fan that uses 120v with an inline switch. (it was free). I noticed that the fan seemed to go faster that a basic computer fan, and was thinking that maybe I need slow the fan down. I'm using 6 Rating: 5