I plan on running my next group in a RDWC set up. What flow rate is common? I will be using 5.3 gallon square buckets for each plant.
I can’t imagine that the flow rate needs to be much more than a trickle…
You need to recycle the water trough you system at least 7 times per hour.
Example, mine is 110 gal max fill line and my return pump is 2000 gph going to 6 13 gal stations. Gravity brings it back to the res, but i like overkill.