ISTA Co2 Tablet x5pcs ( Repack ) as per picture

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 hours for the Co2 tablet to dissolve completely. Application: Simply drop CO2 tablet into the aquarium water it takes about 2 hours for the CO2 tablet to dissolve completely. Dosage : Use 1 tablet per 20L of water to add about 5mg/L CO2 (pH value reduce about 0.2), apply daily.