This system is much like the auto pot system. The main difference, besides the obvious, is the fill valve. The auto pot system has a valve that lets the trough draw down mire before refill. With a clean water supply, these rigs are pretty much zero maintenance all grow season. Just add nutrients to the top when pruning or harvesting plants.
I have used a rig just like this for starting cuttings and seeds. I cut strips of xps to float in the gutters, then just cut holes in the xps the size of whatever. Works like magic.
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