H
HighBurn8
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I went to my local Home & Garden center and bought a Washable Dark Blue A/C Air Filter and fastened it to my fan with a collar. This keeps the dust out and most of the light outside the tent. Once a week or so I just take it off and wash it in the sink. On the inside of the tent I have a 6" ducting hose thats spray painted flat black on the inside, bent at a 90* angle.....this makes it light proof.