ttystikk
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I used these pots for a year or so and loved them. The only problem I had was that I grow on flood tables and it would make a bit of a mess. I went back to fabric pots and the yield etc. was similar without the mess. I still have about 100 of those square 1 gallon so I might eventually give them another run.
Those look cool, I solved the mess problem by running chowmix of 50/50 coco and hydroton. I use netpot bucket lids, sized to fit on a five gallon bucket. When I upsized to 27 gallon tubs, I used this to my advantage by creating spacers with homer buckets. Now, my netpots ride up high in the tubs, maximizing capacity. The root growth has been tremendous! Yes, this is RDWC, but I was running fabric pots at one point over the water before switching to the netpot bucket lids.
I believe that a combination system can be done with fabric bags in cages- a bit like the milk crate idea above, and water trickling through bags as well as through rdwc underneath. This would have potential advantages for substrateoptions, plus the chance for roots to do more than air prune underneath, even while retaining their portability while growing plants otherwise far too big for their size.
I'm thinking about raising fish and running their waste water through a biobed filter and into a system like this, thus it could be both organic, soil life positive AND RDWC. This is a bit like a system I saw being experimented with a few summer's ago, but it expands the water use circuit to include fish, a live source of nutrients and organic material.