Apparently PoolBoysTX12 knows a lot about growing marijuana (wink). This speculation of his actually was accepted by many. We know that a plant needs water and sunlight to grow, but it has been recorded many incidents in history of growing Marijuana in a closed shut room. PoolBoysTX12 further explains- “Vent shaft for squirrel fan to move the air out. The metal plumbing was used for hydro phonics [sic] watering system.” See, he knows a lot. Also he can be absolutely right about this, but we know nothing by now. But what do you think about it? Can it be true? Tell us in comments and then we can proceed further.