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im just putting my room together when u set up a recirculating drip system do you have to have another tray on top of your reservoir or can u just have your plants on top of the reservoir and the drip system just recircs the water back into the reservoir rather than having a drip tray or do i have to have a drip tray emptying back into reservoir just trying to work out best and easiest way to set up a drip feeding system any help well be muchly appreciated also if i have a fan inside the tent with an exhaust fan up top with air purifier will that create enough air circulation to keep plants healthy or do i really need an inlet fan as well as i have every thing i need but an inlet fan just want to know if its a must or not as the fan inside blows air around