Very interesting, more details please!
okay! so basically it is meant as a floating aquaponics system that can go anywhere ( I have them in my fish tanks as natural filters too! ) they cost somewhere around 5 bucks to make, and as long as you use only materials listed below they are 100% fish safe, I have tested them in as little as 1 gallon of water with a beta and some basil
they work sort of like bog filters, in that the water comes through holes punctured in the sides and bottom of the cup, so that the plant can then suck in toxic fish waste through its roots, and clean the water.
here are materials:
1, 9 ounce ( bigger works to ) clear solo cup ( this has to be the flexible kind and not 100 percent rigid )
some sort of planting media, preferably something that inst very heavy, like aquaponics clay balls
a small board of Styrofoam
and optionally a cover for the top of the Styrofoam, this will be made out of clear plastic
step 1
puncture holes in the lower sides and bottom of the solo cup
step 2
using a steak knife or Styrofoam cutter, carve out a doughnut of Styrofoam, that snugly fits inside the cup, but has a middle hole big enough to put the pant through
step 3
put in you growing media to halfway full, the put the Styrofoam into the top of the cup, after this all you have to do is slip the pant through the top and wala you have a planter!
side note: you may have to do some balancing to get it stable, but adgusting how the Styrofoam sits should usually be enough