Aquario Neo CO2 DIY Kit

Slow-release DIY CO2 kit for beginners, with a bottle, bio powder, diffuser, tubing and suction cups. A bottle runs for up to 50–60 days and serves about 20 gallons; a larger tank uses more bottles. It can't be turned off or adjusted. Retailers Buce Plant and Nature Aquariums describe it for 10 to 30 gallon tanks, and Bulk Reef Supply says it is best above 10 gallons, because a smaller tank can get too much CO2.

Max tank volume

75.7 L