Everything for hydroculture. Hydroponics is a method of cultivation where no soil is used but an aqueous solution as a support. This solution must contain essential nutrients to feed the plants in this environment. These elements are of course nitrogen, potassium and phosphorus, but plants also need trace elements like iron to survive in this environment. Use fertilizers designed for this type of culture, they will be correctly dosed and will not burn your roots. Roots also draw oxygen from the water. To increase this rate, you can install a small aquarium pump to generate movement on the surface of the water and thus, by the agitation created, oxygenate the water. Finally, to maintain the plants correctly, you can use expanded clay balls, but also pebbles, glass balls, stakes, foam for aquarium filters, ...