The Idrocaps can be used with Idropots (all sizes) or be placed directly above any other square pot or Rockwool cube of the same size filled with your favorite mixture.
 
Thanks to the honeycomb design on the top of the cap, the water is distributed with uniformity. The Idrocap also contributes to maintain a clean and healthy environment, free from pathogens, by blocking the light and thus preventing the formation of weeds in the grow medium. One size only: 15x15cm.