Product name： ISTA CO2 Tablet (100pcs) #I-510
● Easy and convenient way to provide Co2 for your aquarium plants to thrive.
● By gradually dissolving in the water to release Co2 into the aquarium water.
● Provide same function and effect to bottled gas Co2
● Simply drop the Co2 tablet into the aquarium water. It takes about 2 hoursfor the Co2 tablet to dissolve completely.