I'm a total indoor noob and I'm working on my first 3x3x8 grow room and I trying to figure out how much soil to buy. How many pounds of soil will fill a 3 gallon container? I might be ordering it online and need to know. Also can you recommend some good soil to use that wont break the bank. I know you get what you pay for. I'm looking for something that wont have weeds or bugs in it and is already PH friendly? Any help will be appreciated.