sera CO₂-Start consists of the sera CO₂ Diffusion Reactor and the sera CO₂-Tabs plus. Dissolving one tablet of the sera CO₂-Tabs plus releases trace elements and activating substances along with the carbon dioxide. The minerals immediately disperse in the aquarium water. As the CO₂ slowly and evenly permeates through the special plastic material of the sera CO₂ Diffusion Reactor, it becomes available to the plants for several hours. This allows sufficient time for all the plants to take an optimal share.