These are a 3 pack of the 95g Hagen Fluval Replacement CO2 Cartridges
We carry the Hagen Fluval pressurized CO2 Kits which can be found in this category. Make sure to get a few extra as they do require occasional replacement to keep the water in it’s ideal condition for planted tanks. Ordering online saves you time and money. You won’t have to drive out to the fish store and get them delivered to your door!