Anyone here that´s into hydroponics/aquaponics etc that also 3D-print PVA? Perhaps this is something for you
https://www.thingiverse.com/thing:2735455
@Nathan_Walkner please read the instructions
@Nathan_Walkner “(PVA will dissolve in water thus creating the cavity after molding)” also this design will hopefully not be killed by present patents, check the linked old design if you have the time and interest
+Nathan Walkner I think the end product can’t be printed. It sounds like it’s for making a concrete block with a cavity shaped like this part.
PVC would make more sense 
Or PVA as a support structure for actual material would make even more sense
@Nick_Kloski1 this design is for molding (thus PVA is making sence here), my original design (seen in the videos) had a 3D printed housing but I was forced to remove the files due to an alleged patent infringement.