Co2 tanks are used in freshwater and saltwater Aquariums.
You can only get these co2 tanks via the link above @ the top of the page if you want this tank for paintball refill, hydroponic, plant, growing, aquarium, salwater,freshwater,tank
We know you want this co2 cylinderbut you need to use the link above @ the top of the page if you want this tank for hydroponic plant growing use or otherwise