>>2012957Drill a small hole in each of the buckets near the bottom on the side, attach a grommet and insert a barb.
Then attach all buckets to a large reservoir
If all containers are at equal height, gravity will make sure all containers are at equal water level
You can even get crazier and add a float valve into the reservoir, this will allow you to attach another reservoir that will keep the main one topped off
pic related for reference
