They are inert black neoprene discs, which do not retain water and are totally waterproof. They serve to firmly hold your plants in a lid, so the diffusers spray the roots that are floating down and keep them hydrated. A simple system that works very well especially when making cuttings, they come out very fast and healthy in a few days.

An article without waste, since they do not cost a lot of money and they play a very important role in our aeroponic crops. When they are old and somewhat porous, they take up more lime and sometimes they cost a lot to clean, change your discs every year so that you do not have problems with salts or algae in our crop.

They are universal, they work for most aero systems.