It’s handy to have both outside the tent firstly Cos it’s easier to manage adding nutes and stuff once your plants get big and it’ll be closer to the chiller if your using one. Chiller works quite hard at the start till you got a decent canopy. And header pot being outside will be less to absorb the heat from lights. Also saves opening tent to make adjustments.
The alien one I’ve got has a float valve to let the top up res fill up the system as the level drops.
Gotta be nice and level as I’ve found out my pots are all I’ve the place sometimes and still add a few buckets of water here and there.
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