Give your planted freshwater the kick-start it needs to be a strong, healthy environment! The Advanced CO2 Disposable Supply Set by Ista is the ideal system to implement in order to supplement your lush growing aquatic haven with the carbon dioxide it craves! Install this super convenient, and easy to assemble kit and watch your plants flourish! Treat any planted aquarium up to 40 gallons with this complete set! It contains everything you need to run a successful CO2 system, including a disposable 95 gram CO2 cartridge, a supporting base, air line, and an air line holder. It also contains a CO2 indicator, and CO2 Solution of Indicator to closely monitor the levels of carbon dioxide in your water, as well as a 3-in-1 Compact V CO2 Diffuser to optimize supplementation, and a CO2 pressure regulator to prevent back pressure!