If you use small buckets I would suggest not growing monster plants or you could always “trim” the roots. I have never done this but hear about people doing it.
Are you talking about the clear 1/4" hose? That puts oxygen in the water as it passes. Then as it comes into the bucket it shoots out through find, this creates extra oxygen in your system. I will also have 1 stone in each bucket and possibly in the top off bucket.
Eventually I would like to get a float valve installed in the bucket and have a resivoir outside the tents. Then I wouldn’t have to worry about lack of water if I’m gone for too long.