I was wondering if this would work similar to a Hempy bucket. If you put this insert into the bucket and make sure you put your Hempy hole just below where the top of the insert sits wouldn't that be like a passive hydro setup. You could just pile your coco on top of the insert and away you go, no Perlite or Verm needed. It would seem to hold even more water at the bottom since there is no Perlite filling the bottom void, thus reducing the frequency of the waterings even more.
https://www.chemicalguys.com/Cyclone_Dirt_Trap_Car_Wash_Bucket_Insert_p/dirttrap.htm?1=1&CartID=0
https://www.chemicalguys.com/Cyclone_Dirt_Trap_Car_Wash_Bucket_Insert_p/dirttrap.htm?1=1&CartID=0
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