I have a small fountain pump in a 5 gallon bucket. Have a hose hook to it. With a 3 ' piece of pex pipe with a fountain sprinkler head on the end. Control it with a foot switch pedal. Barely open the tent door and can reach all plants without going into tent. It is awesome. Tried to upload a video but sits at 99%.
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I use reverse osmosis water. As for the container I use, I like this 2L one: https://bit.ly/35FnhQX