Co2 Gas Tank for planted tank.
The two basic requirements for healthy aquarium plants are light and proper carbon dioxide (CO2) levels. Through a process called "photosynthesis", aquarium plants use light energy and CO2 to produce food necessary for a lush growth. As plants develop, they use up their existing supply of carbon dioxide. Installing a CO2 system is essential to prevent low CO2 levels and to maintain active plant growth in your aquarium.