Hydroponics

Hydroponics is the growth of plants in a liquid medium, rather than soil. Plants are often supported at the stalk, leaving the roots free floating. In other cases, roots may be supported by inorganic media, such as plastic pellets, gravel, or mineral wool. All nutrients are supplied through the liquid.

The liquid is held by vessels or pipes, that in some cases include a circulation system with automatic renewal and filtering. All parts that are in regular contact with the liquid are cleaned or replaced in regular intervals.

. It amazed me how well ehtyreving worked even with the less than ideal conditions, as you can see in the follow up videos. I talked to Matt at Sure to Grow about the algae. It was caused by the hydroton wicking solution to the surface of the cube. The algae never penetrated the cube. The ph was fine, any problems were caused by the lack of light protection. Thank you for taking the time to comment.

Disadvantages

While a natural soil based environment can stabilize itself, the hydroponics require technological support and regular maintenance:

Artificial fertilizer and other auxiliary substances (antibiotics, cleaners, acidity regulators, etc. ) needed, which requires a chemical industry behind.
Cleaning and disposal of toxic degradation products.
Higher manual maintenance effort.